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  <xs:element id="gbci_PaymentsForProceedsFromNonMarketableEquitySecurities" abstract="false" name="PaymentsForProceedsFromNonMarketableEquitySecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_PeriodOfEmploymentRequiredToBeEligibleForPlan" abstract="false" name="PeriodOfEmploymentRequiredToBeEligibleForPlan" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gbci_StateBankOfArizonaMember" abstract="true" name="StateBankOfArizonaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_HomeEquityPortfolioSegmentMember" abstract="true" name="HomeEquityPortfolioSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_CollateralDependentLoans" abstract="false" name="CollateralDependentLoans" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_AccountingFees" abstract="false" name="AccountingFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_MinimumNumberOfQuartersRequiredToBeEligibleForEmployerDiscretionaryContribution" abstract="false" name="MinimumNumberOfQuartersRequiredToBeEligibleForEmployerDiscretionaryContribution" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="gbci_DebitCardExpense" abstract="false" name="DebitCardExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_LesseeLeaseLiabilityMaturityTableTextBlock" abstract="false" name="LesseeLeaseLiabilityMaturityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gbci_VariableInterestEntitiesInvestmentAmortization" abstract="false" name="VariableInterestEntitiesInvestmentAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssets" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBorrowings" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBorrowings" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_OtherRealEstateOwnedFairValueDisclosure" abstract="false" name="OtherRealEstateOwnedFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_FirstCompanyStatutoryTrust2003Member" abstract="true" name="FirstCompanyStatutoryTrust2003Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_SizeOfCompanyEligibleForTier1GrandfatherProvision" abstract="false" name="SizeOfCompanyEligibleForTier1GrandfatherProvision" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_RightOfUseAsset" abstract="false" name="RightOfUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_StandardPoorsAAOrARatingsMember" abstract="true" name="StandardPoorsAAOrARatingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_MoodysA1A2OrA3RatingsMember" abstract="true" name="MoodysA1A2OrA3RatingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_PercentageOfConsolidatedStockholdersEquityExceedingWhichNoBorrowerHadOutstandingLoansOrCommitments" abstract="false" name="PercentageOfConsolidatedStockholdersEquityExceedingWhichNoBorrowerHadOutstandingLoansOrCommitments" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gbci_MoodysNotRatedMember" abstract="true" name="MoodysNotRatedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_MaximumNumberOfConsecutiveQuartersForDeferralOfInterestPaymentsOnTrustPreferredSecurities" abstract="false" name="MaximumNumberOfConsecutiveQuartersForDeferralOfInterestPaymentsOnTrustPreferredSecurities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="gbci_ImpairedLoansMeasurementInput" abstract="false" name="ImpairedLoansMeasurementInput" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="gbci_LettersofCreditMember" abstract="true" name="LettersofCreditMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_DeferredCompensationPlanMember" abstract="true" name="DeferredCompensationPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_AccretionAmortizationOfDiscountsAndPremiumsBusinessCombinations" abstract="false" name="AccretionAmortizationOfDiscountsAndPremiumsBusinessCombinations" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_UnamortizedLoanOriginationFeesAndCosts" abstract="false" name="UnamortizedLoanOriginationFeesAndCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_DeferredCompensationPlanAcquiredMember" abstract="true" name="DeferredCompensationPlanAcquiredMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_LossOnHedgingActivity" abstract="false" name="LossOnHedgingActivity" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_StandardPoorsAAAAOrAARatingsMember" abstract="true" name="StandardPoorsAAAAOrAARatingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_InterestExpenseFederalHomeLoanBankAdvance" abstract="false" name="InterestExpenseFederalHomeLoanBankAdvance" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_LoanRelatedExpenses" abstract="false" name="LoanRelatedExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_RetirementPlanEmployeeAgeDomain" abstract="true" name="RetirementPlanEmployeeAgeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLoansReceivable" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLoansReceivable" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_OtherMember" abstract="true" name="OtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_StandardPoorsNotRatedMember" abstract="true" name="StandardPoorsNotRatedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_InterestReceivableHeldToMaturityDebtSecurities" abstract="false" name="InterestReceivableHeldToMaturityDebtSecurities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_EmployeeAge50andOverMember" abstract="true" name="EmployeeAge50andOverMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_QualifiedAffordableHousingProjectInvestmentsCommitmentToBePaidYearOne" abstract="false" name="QualifiedAffordableHousingProjectInvestmentsCommitmentToBePaidYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_FairValueMeasurementTransfersFromOneLevelToAnother" abstract="false" name="FairValueMeasurementTransfersFromOneLevelToAnother" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_GlacierCapitalTrustIiMember" abstract="true" name="GlacierCapitalTrustIiMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_HeldToMaturitySecuritiesSoldSecurityRealizedLoss" abstract="false" name="HeldToMaturitySecuritiesSoldSecurityRealizedLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_MinimumPeriodPastDueToConsiderLoansAsDelinquent" abstract="false" name="MinimumPeriodPastDueToConsiderLoansAsDelinquent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gbci_ServicingAssetAtAmortizedCostAcquisitions" abstract="false" name="ServicingAssetAtAmortizedCostAcquisitions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_FinancialAssetsFairValueDisclosure" abstract="false" name="FinancialAssetsFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_NumberOfBankDivisions" abstract="false" name="NumberOfBankDivisions" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="gbci_SecuritiesGrossUnrealizedGainAccumulatedInInvestments" abstract="false" name="SecuritiesGrossUnrealizedGainAccumulatedInInvestments" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_NumberOfYearsBeforeAllowedToPrepayDebt" abstract="false" name="NumberOfYearsBeforeAllowedToPrepayDebt" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gbci_ProceedsFromSalesAndCallsOfDebtSecuritiesAvailableForSale" abstract="false" name="ProceedsFromSalesAndCallsOfDebtSecuritiesAvailableForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_FinancingReceivableAllowanceForCreditLossesNumberOfComponents" abstract="false" name="FinancingReceivableAllowanceForCreditLossesNumberOfComponents" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="gbci_QualifiedAffordableHousingProjectInvestmentsCommitmentToBePaidYearTwo" abstract="false" name="QualifiedAffordableHousingProjectInvestmentsCommitmentToBePaidYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_PercentageOfBonusesAndDirectorsFeesForDeferralOfCashPayments" abstract="false" name="PercentageOfBonusesAndDirectorsFeesForDeferralOfCashPayments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gbci_FNBUTStatutoryTrustIMemberMember" abstract="true" name="FNBUTStatutoryTrustIMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_GlacierCapitalTrustIiiMember" abstract="true" name="GlacierCapitalTrustIiiMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_DefinedContributionPlanAgeOfEmployee" abstract="false" name="DefinedContributionPlanAgeOfEmployee" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="gbci_InterestReceivableAvailableForSaleDebtSecurities" abstract="false" name="InterestReceivableAvailableForSaleDebtSecurities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_TimeDepositsThatMeetOrExceedFDICInsuranceLimit" abstract="false" name="TimeDepositsThatMeetOrExceedFDICInsuranceLimit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_FNBUTStatutoryTrustIIMember" abstract="true" name="FNBUTStatutoryTrustIIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_BusinessAssetsMember" abstract="true" name="BusinessAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_NonperformingFinancialInstrumentsNonAccrualAnd90DaysOrMorePastDueMember" abstract="true" name="NonperformingFinancialInstrumentsNonAccrualAnd90DaysOrMorePastDueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_MinimumNumberOfHoursRequiredToBeConsideredEligibleForEmployerDiscretionaryContribution" abstract="false" name="MinimumNumberOfHoursRequiredToBeConsideredEligibleForEmployerDiscretionaryContribution" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="gbci_CashConsiderationForOutstandingShares" abstract="false" name="CashConsiderationForOutstandingShares" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_JuniorSubordinatedDebentureOwedtoUnconsolidatedSubsidiaryTrustMember" abstract="true" name="JuniorSubordinatedDebentureOwedtoUnconsolidatedSubsidiaryTrustMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_ConsultingFees" abstract="false" name="ConsultingFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_BusinessCombinationAndIntangibleAssetsPolicyPolicyTextBlock" abstract="false" name="BusinessCombinationAndIntangibleAssetsPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gbci_SecuritiesGrossUnrealizedLossAccumulatedInInvestments" abstract="false" name="SecuritiesGrossUnrealizedLossAccumulatedInInvestments" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_RetirementPlanEmployeeAgeAxis" abstract="true" name="RetirementPlanEmployeeAgeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="gbci_UnamortizedDiscountsAndPremiumsOnLoans" abstract="false" name="UnamortizedDiscountsAndPremiumsOnLoans" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_PaymentsForLoansOriginatedOrAcquired" abstract="false" name="PaymentsForLoansOriginatedOrAcquired" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_VIEWriteDownsLossesAndOtherExpenses" abstract="false" name="VIEWriteDownsLossesAndOtherExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_BankOwnedLifeInsurancePolicyPolicyTextBlock" abstract="false" name="BankOwnedLifeInsurancePolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gbci_CapitalConservationBufferToRiskWeightedAssetsCurrentYear" abstract="false" name="CapitalConservationBufferToRiskWeightedAssetsCurrentYear" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gbci_MaximumPeriodOfOriginalMaturityToBeIncludedInCashAndCashEquivalents" abstract="false" name="MaximumPeriodOfOriginalMaturityToBeIncludedInCashAndCashEquivalents" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gbci_CreditEarningRateAsPercentageOfReturnOnEquity" abstract="false" name="CreditEarningRateAsPercentageOfReturnOnEquity" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gbci_ScheduledMaturitiesOfCertificatesOfDepositTableTextBlock" abstract="false" name="ScheduledMaturitiesOfCertificatesOfDepositTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gbci_DividendsDeclaredButNotPaidDuringThePeriod" abstract="false" name="DividendsDeclaredButNotPaidDuringThePeriod" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_TierOneCommonCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" abstract="false" name="TierOneCommonCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLiabilities" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_AOCIAccumulatedGainLossDebtSecuritiesAvailableForSaleAmortizationIncludedInNetIncomeParentMember" abstract="true" name="AOCIAccumulatedGainLossDebtSecuritiesAvailableForSaleAmortizationIncludedInNetIncomeParentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_FinancingReceivableNonaccrualWithAllowance" abstract="false" name="FinancingReceivableNonaccrualWithAllowance" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_FederalReserveBalanceOrCashOnHandRequired" abstract="false" name="FederalReserveBalanceOrCashOnHandRequired" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_ServiceChargesAndOtherFees" abstract="false" name="ServiceChargesAndOtherFees" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_CombinedApproachValuationTechniqueMember" abstract="true" name="CombinedApproachValuationTechniqueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_MiscellaneousLoanFeesAndCharges" abstract="false" name="MiscellaneousLoanFeesAndCharges" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_DepositsTextualAbstract" abstract="true" name="DepositsTextualAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gbci_SupplementalEmployeeRetirementPlansMember" abstract="true" name="SupplementalEmployeeRetirementPlansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_AOCIAccumulatedGainLossDebtSecuritiesAvailableForSaleGainsAndTransfersIncludedInNetIncomeParentMember" abstract="true" name="AOCIAccumulatedGainLossDebtSecuritiesAvailableForSaleGainsAndTransfersIncludedInNetIncomeParentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_QualifiedAffordableHousingProjectInvestmentsCommitmentToBePaidYearFour" abstract="false" name="QualifiedAffordableHousingProjectInvestmentsCommitmentToBePaidYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_OperatingLossandTaxCreditCarryforwardsTable" abstract="true" name="OperatingLossandTaxCreditCarryforwardsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="gbci_LoansHeldForSaleMember" abstract="true" name="LoansHeldForSaleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_TermsOfSubordinatedDebenturesTableTextBlock" abstract="false" name="TermsOfSubordinatedDebenturesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gbci_IncomeBeforeEquityInUndistributedEarningsOfSubsidiaries" abstract="false" name="IncomeBeforeEquityInUndistributedEarningsOfSubsidiaries" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_AdditionalOutstandingCommitmentsOnTroubledDebtRestructuring" abstract="false" name="AdditionalOutstandingCommitmentsOnTroubledDebtRestructuring" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_CurrentYearAcquisitionsMember" abstract="true" name="CurrentYearAcquisitionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_CommitmenttoExtendCreditMember" abstract="true" name="CommitmenttoExtendCreditMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_RealEstateAcquiredThroughForeclosureSecuredByResidentialRealEstate" abstract="false" name="RealEstateAcquiredThroughForeclosureSecuredByResidentialRealEstate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_DebtSecuritiesFairValue" abstract="false" name="DebtSecuritiesFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_GlacierBankMember" abstract="true" name="GlacierBankMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_MaximumTermLeasesWillBeConsideredShortTerm" abstract="false" name="MaximumTermLeasesWillBeConsideredShortTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gbci_QualifiedAffordableHousingProjectInvestmentsCommitmentToBePaidYearFive" abstract="false" name="QualifiedAffordableHousingProjectInvestmentsCommitmentToBePaidYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_FinancingReceivableNonaccrualInterestIncomeReversed" abstract="false" name="FinancingReceivableNonaccrualInterestIncomeReversed" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_IntercompanyChargesForServices" abstract="false" name="IntercompanyChargesForServices" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_CitizensIdStatutoryTrustIMember" abstract="true" name="CitizensIdStatutoryTrustIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_DefinedContributionPlanMember" abstract="true" name="DefinedContributionPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gbci_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gbci_QualifiedAffordableHousingProjectInvestmentsCommitmentToBePaidYearThree" abstract="false" name="QualifiedAffordableHousingProjectInvestmentsCommitmentToBePaidYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gbci_NonmarketableSecuritiesEquitySecurities" abstract="false" name="NonmarketableSecuritiesEquitySecurities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
