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    <link:label id="lab_dei_EntityTaxIdentificationNumber_label_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Tax Identification Number</link:label>
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    <link:label id="lab_srt_MaximumMember_label_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
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    <link:label id="lab_dei_LegalEntityAxis_019ea7a9-a8b3-766c-bdd6-f1ec948ee25c_terseLabel_en-US" xlink:label="lab_dei_LegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:label id="lab_dei_LegalEntityAxis_label_en-US" xlink:label="lab_dei_LegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LegalEntityAxis" xlink:to="lab_dei_LegalEntityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_RangeMember_019ea7a9-a8b3-7d1b-9b71-da5c624d6c7b_terseLabel_en-US" xlink:label="lab_srt_RangeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statistical Measurement [Domain]</link:label>
    <link:label id="lab_srt_RangeMember_label_en-US" xlink:label="lab_srt_RangeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statistical Measurement [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeMember" xlink:to="lab_srt_RangeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_019ea7a9-a80e-7e09-9602-ec2b902ecf42_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Description of Plan [Table]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Description of Plan [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_MutualFundMember_019ea7a9-a80e-7f64-853f-c6d4b06e0fbe_terseLabel_en-US" xlink:label="lab_us-gaap_MutualFundMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares of registered investment companies</link:label>
    <link:label id="lab_us-gaap_MutualFundMember_label_en-US" xlink:label="lab_us-gaap_MutualFundMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mutual Fund [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MutualFundMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MutualFundMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MutualFundMember" xlink:to="lab_us-gaap_MutualFundMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrected_019ea7a9-a80e-7c02-95be-7f770611eb66_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrected" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Fully Corrected Under VFCP and PTE 2002-51</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrected_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrected" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Schedule of Delinquent Participant Contribution, Corrected</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrected" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrected"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrected" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrected" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_019ea7a9-a8b3-7032-a76a-f0c26fff8be0_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Related Party and Party-in-Interest Transactions [Table]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Related Party and Party-in-Interest Transactions [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease_019ea7a9-a8b3-72ba-8fa0-d559f33ef28b_negatedTotalLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US">Total deductions</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Change in Net Asset Available for Benefit, Decrease</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_CashEquivalentsMember_019ea7a9-a80e-70af-ba3b-9bdf602e46c5_terseLabel_en-US" xlink:label="lab_us-gaap_CashEquivalentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashEquivalentsMember_label_en-US" xlink:label="lab_us-gaap_CashEquivalentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Equivalents [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashEquivalentsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashEquivalentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashEquivalentsMember" xlink:to="lab_us-gaap_CashEquivalentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount_019ea7a9-a8b3-7a1a-b9c1-5f2a69bb3847_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum borrowing, amount</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock_019ea7a9-a8b3-76e5-89ed-11f8698035ec_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FAIR VALUE MEASUREMENTS</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Investment, Fair Value and NAV [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount_019ea7a9-a8b3-7678-9351-6d7320fb87d3_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum borrowing, amount</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue_019ea7a9-a8b3-7ab1-aa76-d74555121770_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total assets at fair value</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_019ea7a9-a8b3-7de4-8d11-d37a0fc16bb4_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Level 1</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 1 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel1Member" xlink:to="lab_us-gaap_FairValueInputsLevel1Member" xlink:type="arc" order="1"/>
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    <link:label id="lab_rock_EBPParticipantContributionMaximumAnnualContributionToEligibleCompensationPercentage_label_en-US" xlink:label="lab_rock_EBPParticipantContributionMaximumAnnualContributionToEligibleCompensationPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Participant Contribution, Maximum Annual Contribution to Eligible Compensation, Percentage</link:label>
    <link:label id="lab_rock_EBPParticipantContributionMaximumAnnualContributionToEligibleCompensationPercentage_documentation_en-US" xlink:label="lab_rock_EBPParticipantContributionMaximumAnnualContributionToEligibleCompensationPercentage" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBP, Participant Contribution, Maximum Annual Contribution to Eligible Compensation, Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_rock_EBPParticipantContributionMaximumAnnualContributionToEligibleCompensationPercentage" xlink:href="rock-20260626.xsd#rock_EBPParticipantContributionMaximumAnnualContributionToEligibleCompensationPercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rock_EBPParticipantContributionMaximumAnnualContributionToEligibleCompensationPercentage" xlink:to="lab_rock_EBPParticipantContributionMaximumAnnualContributionToEligibleCompensationPercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Investment, Fair Value and NAV [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavAbstract" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_RangeAxis_019ea7a9-a8b3-76d4-95d6-f6ec4906a833_terseLabel_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
    <link:label id="lab_srt_RangeAxis_label_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeAxis" xlink:to="lab_srt_RangeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_019ea7a9-a8b3-7167-9a81-6a3b55d323a5_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additions:</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Change in Net Asset Available for Benefit, Increase [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable_019ea7a9-a8b3-72a1-b7ef-ecd48f1f0e01_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Statement of Change in Net Asset Available for Benefit [Table]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Statement of Change in Net Asset Available for Benefit [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock_019ea7a9-a8b3-70d1-8f4a-785f07d97ee3_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Benefits</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Payment to Participant [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_AmendmentFlag_019ea7a9-a8b3-725c-9efb-82731413952f_terseLabel_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:label id="lab_dei_AmendmentFlag_label_en-US" xlink:label="lab_dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock_019ea7a9-a8b3-711c-85f4-b4fded3291e9_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basis of Accounting</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Basis of Accounting [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_019ea7a9-a80e-7037-af10-742f91cefb3c_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Schedule of Asset Held for Investment [Table]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Schedule of Asset Held for Investment [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Description of Plan and Accounting Change [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanAbstract" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract_019ea7a9-a8b3-790e-a6b4-7c4c9ae96427_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivables:</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Receivable [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock_019ea7a9-a8b3-70b6-96ca-753f67967dc4_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Investment, Fair Value and NAV</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Investment, Fair Value and NAV [Table Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanContributionAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanContributionAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Contribution [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanContributionAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanContributionAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanContributionAbstract" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanContributionAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Schedule of Delinquent Participant Contribution [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionAbstract" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentTypeCategorizationMember_019ea7a9-a8b3-7f44-901b-37959342c953_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentTypeCategorizationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments [Domain]</link:label>
    <link:label id="lab_us-gaap_InvestmentTypeCategorizationMember_label_en-US" xlink:label="lab_us-gaap_InvestmentTypeCategorizationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember" xlink:to="lab_us-gaap_InvestmentTypeCategorizationMember" xlink:type="arc" order="1"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanUseOfEstimatePolicyTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanUseOfEstimatePolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Use of Estimate [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanUseOfEstimatePolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanUseOfEstimatePolicyTextBlock"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Schedule of Asset Held for Investment [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock"/>
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    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CoverAbstract"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanRiskAndUncertaintyTextBlock_019ea7a9-a8b3-7a0b-84d2-88516f38acf1_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanRiskAndUncertaintyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">RISKS AND UNCERTAINTIES</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanRiskAndUncertaintyTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanRiskAndUncertaintyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Risk and Uncertainty [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRiskAndUncertaintyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRiskAndUncertaintyTextBlock"/>
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    <link:label id="lab_srt_MinimumMember_label_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum [Member]</link:label>
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    <link:label id="lab_us-gaap_InvestmentTypeAxis_019ea7a9-a8b3-70fa-8dee-c246edcf6d49_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Type [Axis]</link:label>
    <link:label id="lab_us-gaap_InvestmentTypeAxis_label_en-US" xlink:label="lab_us-gaap_InvestmentTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Type [Axis]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionExcludingRollover" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionExcludingRollover"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment_019ea7a9-a8b3-7691-9c9d-12c5bfaa7524_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net appreciation in fair value of investments</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment_019ea7a9-a8b3-74e8-99a8-90289b9eb027_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest and dividends</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_019ea7a9-a8b3-70cf-a5d1-f399b4bd8736_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Description of Plan [Line Items]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Description of Plan [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanPlanNumber_019ea7a9-a80e-75a7-860d-352837fa9028_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanPlanNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan number</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanPlanNumber_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanPlanNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Plan Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanPlanNumber" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanPlanNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanPlanNumber" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanPlanNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems_019ea7a9-a80e-78ac-b6e0-9d1c25b583be_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Investment, Fair Value and NAV [Line Items]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Investment, Fair Value and NAV [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock_019ea7a9-a8b3-76de-8408-299d9d8432a0_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">DESCRIPTION OF PLAN</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Description of Plan [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionPendingCorrectionInVfcp_019ea7a9-a8b3-79f7-9133-dd0836dc6a0a_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionPendingCorrectionInVfcp" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contributions Pending Correction in VFCP</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionPendingCorrectionInVfcp_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionPendingCorrectionInVfcp" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Schedule of Delinquent Participant Contribution, Pending Correction in VFCP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionPendingCorrectionInVfcp" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionPendingCorrectionInVfcp"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_019ea7a9-a8b3-7b93-950e-fd084e188a76_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Statement of Change in Net Asset Available for Benefit [Line Items]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Statement of Change in Net Asset Available for Benefit [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable_019ea7a9-a8b3-7b5c-8819-3df8f416598b_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Statement of Net Asset Available for Benefit [Table]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Statement of Net Asset Available for Benefit [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_019ea7a9-a80e-7c56-9f40-239688fa2d91_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Schedule of Asset Held for Investment [Line Items]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Schedule of Asset Held for Investment [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanContributionPolicyTextBlock_019ea7a9-a8b3-7a56-8266-5a163c8760eb_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanContributionPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contributions</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanContributionPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanContributionPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Contribution [Policy Text Block]</link:label>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_019ea7a9-a8b3-7f19-b32e-e9db69c03a19_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employer securities</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Employer, Common Stock [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember"/>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentAbstract"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_019ea7a9-a80e-7b99-9d3e-704e08718bc4_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Accounting Policy [Table]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Accounting Policy [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease_019ea7a9-a80e-7fbc-9b7d-075c01650e80_totalLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total additions</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Change in Net Asset Available for Benefit, Increase</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease" xlink:type="arc" order="1"/>
    <link:label id="lab_rock_EBPEmployerMatchingContributionThresholdTwoMember_019ea7a9-a8b3-7ac2-b0c3-81de4b80cea2_terseLabel_en-US" xlink:label="lab_rock_EBPEmployerMatchingContributionThresholdTwoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Employer Matching Contribution, Threshold Two</link:label>
    <link:label id="lab_rock_EBPEmployerMatchingContributionThresholdTwoMember_label_en-US" xlink:label="lab_rock_EBPEmployerMatchingContributionThresholdTwoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Employer Matching Contribution, Threshold Two [Member]</link:label>
    <link:label id="lab_rock_EBPEmployerMatchingContributionThresholdTwoMember_documentation_en-US" xlink:label="lab_rock_EBPEmployerMatchingContributionThresholdTwoMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBP, Employer Matching Contribution, Threshold Two</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_rock_EBPEmployerMatchingContributionThresholdTwoMember" xlink:href="rock-20260626.xsd#rock_EBPEmployerMatchingContributionThresholdTwoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rock_EBPEmployerMatchingContributionThresholdTwoMember" xlink:to="lab_rock_EBPEmployerMatchingContributionThresholdTwoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_InvestmentIdentifierAxis_019ea7a9-a8b3-797d-a99d-493299a1af18_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIdentifierAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment, Identifier [Axis]</link:label>
    <link:label id="lab_us-gaap_InvestmentIdentifierAxis_label_en-US" xlink:label="lab_us-gaap_InvestmentIdentifierAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Identifier [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIdentifierAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIdentifierAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIdentifierAxis" xlink:to="lab_us-gaap_InvestmentIdentifierAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestment_019ea7a9-a8b3-7700-bb2b-7e77f689eaa0_totalLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestment" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Assets held for investment</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestment_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Asset Held for Investment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestment" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestment" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestment" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentInformationLineItems_019ea7a9-a8b3-7d47-940f-b202425e4e4a_terseLabel_en-US" xlink:label="lab_dei_DocumentInformationLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Information [Line Items]</link:label>
    <link:label id="lab_dei_DocumentInformationLineItems_label_en-US" xlink:label="lab_dei_DocumentInformationLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Information [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentInformationLineItems" xlink:to="lab_dei_DocumentInformationLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EbpRiskAndUncertaintyLineItems_019ea7a9-a8b3-722d-8efa-5612efc9a1a3_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EbpRiskAndUncertaintyLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Risk and Uncertainty [Line Items]</link:label>
    <link:label id="lab_us-gaap-ebp_EbpRiskAndUncertaintyLineItems_label_en-US" xlink:label="lab_us-gaap-ebp_EbpRiskAndUncertaintyLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Risk and Uncertainty [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EbpRiskAndUncertaintyLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EbpRiskAndUncertaintyLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EbpRiskAndUncertaintyLineItems" xlink:to="lab_us-gaap-ebp_EbpRiskAndUncertaintyLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EbpRiskAndUncertaintyTable_019ea7a9-a8b3-78ac-a22d-810167095af6_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EbpRiskAndUncertaintyTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Risk and Uncertainty [Table]</link:label>
    <link:label id="lab_us-gaap-ebp_EbpRiskAndUncertaintyTable_label_en-US" xlink:label="lab_us-gaap-ebp_EbpRiskAndUncertaintyTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Risk and Uncertainty [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EbpRiskAndUncertaintyTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EbpRiskAndUncertaintyTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EbpRiskAndUncertaintyTable" xlink:to="lab_us-gaap-ebp_EbpRiskAndUncertaintyTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage_019ea7a9-a80e-725e-8346-417c380d3c58_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Participant compensation matched, percentage</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Employer Contribution, Participant Compensation Matched, Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Statement of Change in Net Asset Available for Benefit [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitAbstract" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueInputsLevel2Member_019ea7a9-a8b3-7423-bacd-d6c54c78ffff_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Level 2</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel2Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 2 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel2Member" xlink:to="lab_us-gaap_FairValueInputsLevel2Member" xlink:type="arc" order="1"/>
    <link:label id="lab_rock_EBPChangeInNetAssetAvailableForBenefitRefundsToThePlan_019ea7a9-a8b3-7404-9ce6-06872cc664a6_terseLabel_en-US" xlink:label="lab_rock_EBPChangeInNetAssetAvailableForBenefitRefundsToThePlan" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Refunds to the plan</link:label>
    <link:label id="lab_rock_EBPChangeInNetAssetAvailableForBenefitRefundsToThePlan_label_en-US" xlink:label="lab_rock_EBPChangeInNetAssetAvailableForBenefitRefundsToThePlan" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Change In Net Asset Available For Benefit, Refunds To The Plan</link:label>
    <link:label id="lab_rock_EBPChangeInNetAssetAvailableForBenefitRefundsToThePlan_documentation_en-US" xlink:label="lab_rock_EBPChangeInNetAssetAvailableForBenefitRefundsToThePlan" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBP, Change In Net Asset Available For Benefit, Refunds To The Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_rock_EBPChangeInNetAssetAvailableForBenefitRefundsToThePlan" xlink:href="rock-20260626.xsd#rock_EBPChangeInNetAssetAvailableForBenefitRefundsToThePlan"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rock_EBPChangeInNetAssetAvailableForBenefitRefundsToThePlan" xlink:to="lab_rock_EBPChangeInNetAssetAvailableForBenefitRefundsToThePlan" xlink:type="arc" order="1"/>
    <link:label id="lab_rock_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm_019ea7a9-a8b3-7575-8a6f-a20ed373b817_terseLabel_en-US" xlink:label="lab_rock_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">General loan, borrowing term</link:label>
    <link:label id="lab_rock_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm_label_en-US" xlink:label="lab_rock_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term</link:label>
    <link:label id="lab_rock_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm_documentation_en-US" xlink:label="lab_rock_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_rock_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm" xlink:href="rock-20260626.xsd#rock_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rock_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm" xlink:to="lab_rock_EBPNoteReceivableFromParticipantGeneralLoanMaximumBorrowingTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanContributionTable_019ea7a9-a80e-7551-8fe9-414063b5b57f_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanContributionTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Contribution [Table]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanContributionTable_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanContributionTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Contribution [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanContributionTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanContributionTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanContributionTable" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanContributionTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution_019ea7a9-a80e-7933-802d-5e1329dcdaa2_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employer contributions</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrectedOutsideVfcp_019ea7a9-a8b3-737f-86fb-4542124f4cec_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrectedOutsideVfcp" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contributions Corrected Outside VFCP</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrectedOutsideVfcp_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrectedOutsideVfcp" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Schedule of Delinquent Participant Contribution, Corrected Outside VFCP</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrectedOutsideVfcp" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionCorrectedOutsideVfcp"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable_019ea7a9-a8b3-7ce7-a43a-3949da454844_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Tax Status [Table]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Tax Status [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanTaxStatusTable"/>
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    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease_019ea7a9-a8b3-7ba9-ae3b-e067dfb3cb85_totalLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net increase in net assets available for benefits</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Change in Net Asset Available for Benefit, Increase (Decrease)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock_019ea7a9-a80e-790e-b1aa-a96056a409e0_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PARTIES IN INTEREST</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Related Party and Party-in-Interest Transactions [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Related Party and Party-in-Interest Transactions [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsAbstract" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyAbstract" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate_019ea7a9-a8b3-7c83-9123-02b2b1311a8c_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pretax maximum annual contribution to eligible compensation, percentage</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Participant Contribution, Automatic, Deferral Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant_019ea7a9-a8b3-7400-afcf-54292987c05d_negatedTerseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Benefits paid to participants</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentInvestmentExcludingPlanInterestInMasterTrustCurrentValue_019ea7a9-a8b3-7932-8b6b-ad2e1b1d01eb_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentInvestmentExcludingPlanInterestInMasterTrustCurrentValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current Value</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentInvestmentExcludingPlanInterestInMasterTrustCurrentValue_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentInvestmentExcludingPlanInterestInMasterTrustCurrentValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentInvestmentExcludingPlanInterestInMasterTrustCurrentValue" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentInvestmentExcludingPlanInterestInMasterTrustCurrentValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentInvestmentExcludingPlanInterestInMasterTrustCurrentValue" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentInvestmentExcludingPlanInterestInMasterTrustCurrentValue" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019ea7a9-a80e-788f-ae64-d39d479d6d4e_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_rock_EBPParticipantLoanBasisSpreadOnVariableRate_019ea7a9-a8b3-71a2-a146-6e666187ad97_terseLabel_en-US" xlink:label="lab_rock_EBPParticipantLoanBasisSpreadOnVariableRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basis spread on variable rate</link:label>
    <link:label id="lab_rock_EBPParticipantLoanBasisSpreadOnVariableRate_label_en-US" xlink:label="lab_rock_EBPParticipantLoanBasisSpreadOnVariableRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Participant Loan, Basis Spread On Variable Rate</link:label>
    <link:label id="lab_rock_EBPParticipantLoanBasisSpreadOnVariableRate_documentation_en-US" xlink:label="lab_rock_EBPParticipantLoanBasisSpreadOnVariableRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBP, Participant Loan, Basis Spread On Variable Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_rock_EBPParticipantLoanBasisSpreadOnVariableRate" xlink:href="rock-20260626.xsd#rock_EBPParticipantLoanBasisSpreadOnVariableRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rock_EBPParticipantLoanBasisSpreadOnVariableRate" xlink:to="lab_rock_EBPParticipantLoanBasisSpreadOnVariableRate" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Statement of Net Asset Available for Benefit [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitAbstract" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_rock_EBPEmployerContributionTypeAxis_019ea7a9-a80e-7581-b609-d55f38975070_terseLabel_en-US" xlink:label="lab_rock_EBPEmployerContributionTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Employer Contribution, Type [Axis]</link:label>
    <link:label id="lab_rock_EBPEmployerContributionTypeAxis_label_en-US" xlink:label="lab_rock_EBPEmployerContributionTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Employer Contribution, Type [Axis]</link:label>
    <link:label id="lab_rock_EBPEmployerContributionTypeAxis_documentation_en-US" xlink:label="lab_rock_EBPEmployerContributionTypeAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBP, Employer Contribution, Type</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_rock_EBPEmployerContributionTypeAxis" xlink:href="rock-20260626.xsd#rock_EBPEmployerContributionTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rock_EBPEmployerContributionTypeAxis" xlink:to="lab_rock_EBPEmployerContributionTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_019ea7a9-a80e-799c-8190-253e839d4876_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Accounting Policy [Line Items]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Accounting Policy [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_rock_EBPEmployerMatchingContributionThresholdOneMember_019ea7a9-a80e-77c2-9f8f-7ed4811b04cb_terseLabel_en-US" xlink:label="lab_rock_EBPEmployerMatchingContributionThresholdOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Employer Matching Contribution, Threshold One</link:label>
    <link:label id="lab_rock_EBPEmployerMatchingContributionThresholdOneMember_label_en-US" xlink:label="lab_rock_EBPEmployerMatchingContributionThresholdOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Employer Matching Contribution, Threshold One [Member]</link:label>
    <link:label id="lab_rock_EBPEmployerMatchingContributionThresholdOneMember_documentation_en-US" xlink:label="lab_rock_EBPEmployerMatchingContributionThresholdOneMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBP, Employer Matching Contribution, Threshold One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_rock_EBPEmployerMatchingContributionThresholdOneMember" xlink:href="rock-20260626.xsd#rock_EBPEmployerMatchingContributionThresholdOneMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rock_EBPEmployerMatchingContributionThresholdOneMember" xlink:to="lab_rock_EBPEmployerMatchingContributionThresholdOneMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Tax Status [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanTaxStatusAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusAbstract" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock_019ea7a9-a8b3-77b1-9c3f-401ad1b1579e_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan Expenses</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Expense [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution_019ea7a9-a8b3-7b2b-bac4-ca98103e5932_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Participant loans</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock_019ea7a9-a80e-7529-bd94-f6221c60521f_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Valuation and Income Recognition</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Investment [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueInputsLevel12And3Member_019ea7a9-a80e-7811-9c51-e0480b63bf32_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel12And3Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel12And3Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel12And3Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel12And3Member" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel12And3Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member" xlink:to="lab_us-gaap_FairValueInputsLevel12And3Member" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentType_019ea7a9-a80e-7f72-9002-aa3cdfa783d8_terseLabel_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:label id="lab_dei_DocumentType_label_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType" xlink:to="lab_dei_DocumentType" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCentralIndexKey_019ea7a9-a8b3-7dd0-8b88-0c35c1b4a06c_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate_019ea7a9-a80e-7aa2-8aef-bf71f7158db5_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Participant loan, interest rate</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Asset Held for Investment, Participant Loan, Interest Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_019ea7a9-a8b3-7fbc-90dd-b64cab72ebc4_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common collective trust</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Collective Trust [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember" xlink:to="lab_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefitAbstract_019ea7a9-a80e-70dd-bea7-c4a76c990c4b_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefitAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net assets available for benefits:</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefitAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefitAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Net Asset Available for Benefit [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefitAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefitAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefitAbstract" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefitAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_rock_EBPEmployerContributionTypeDomain_019ea7a9-a8b3-7534-8539-8b38fa8c5425_terseLabel_en-US" xlink:label="lab_rock_EBPEmployerContributionTypeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Employer Contribution, Type [Domain]</link:label>
    <link:label id="lab_rock_EBPEmployerContributionTypeDomain_label_en-US" xlink:label="lab_rock_EBPEmployerContributionTypeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Employer Contribution, Type [Domain]</link:label>
    <link:label id="lab_rock_EBPEmployerContributionTypeDomain_documentation_en-US" xlink:label="lab_rock_EBPEmployerContributionTypeDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBP, Employer Contribution, Type [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_rock_EBPEmployerContributionTypeDomain" xlink:href="rock-20260626.xsd#rock_EBPEmployerContributionTypeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rock_EBPEmployerContributionTypeDomain" xlink:to="lab_rock_EBPEmployerContributionTypeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EbpRiskAndUncertaintyAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EbpRiskAndUncertaintyAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Risk and Uncertainty [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EbpRiskAndUncertaintyAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EbpRiskAndUncertaintyAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EbpRiskAndUncertaintyAbstract" xlink:to="lab_us-gaap-ebp_EbpRiskAndUncertaintyAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanContributionTextBlock_019ea7a9-a80e-705d-ae30-0ba124c68cb0_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanContributionTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PROHIBITED TRANSACTION</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanContributionTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanContributionTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Contribution [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanContributionTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanContributionTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanContributionTextBlock" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanContributionTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems_019ea7a9-a80e-7bcc-abd2-df38447e0943_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Tax Status [Line Items]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Tax Status [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_019ea7a9-a8b3-74f4-ab0c-a4ef92e277bf_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deductions:</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Change in Net Asset Available for Benefit, Decrease [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant_019ea7a9-a80e-703c-bc65-f6176d7bfc9a_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Notes receivable from participants</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Note Receivable from Participant</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_019ea7a9-a80e-7e46-a268-4b6bd5a691fe_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_label_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock_019ea7a9-a8b3-7db4-9c6a-e33044a517b5_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Summary of Accounting Policy [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityRegistrantName_019ea7a9-a8b3-725f-b383-6b4bade18f99_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:label id="lab_dei_EntityRegistrantName_label_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName" xlink:to="lab_dei_EntityRegistrantName" xlink:type="arc" order="1"/>
    <link:label id="lab_rock_EBP007Member_019ea7a9-a80e-7dc3-aff4-be99844a7b6a_terseLabel_en-US" xlink:label="lab_rock_EBP007Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP 007</link:label>
    <link:label id="lab_rock_EBP007Member_label_en-US" xlink:label="lab_rock_EBP007Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP 007 [Member]</link:label>
    <link:label id="lab_rock_EBP007Member_documentation_en-US" xlink:label="lab_rock_EBP007Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBP 007</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_rock_EBP007Member" xlink:href="rock-20260626.xsd#rock_EBP007Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rock_EBP007Member" xlink:to="lab_rock_EBP007Member" xlink:type="arc" order="1"/>
    <link:label id="lab_rock_EBPOtherInvestmentAndCashEquivalentsMember_019ea7a9-a8b3-7eb1-9904-f2949ebaed3b_terseLabel_en-US" xlink:label="lab_rock_EBPOtherInvestmentAndCashEquivalentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Registered Investment Companies and Cash Equivalents</link:label>
    <link:label id="lab_rock_EBPOtherInvestmentAndCashEquivalentsMember_label_en-US" xlink:label="lab_rock_EBPOtherInvestmentAndCashEquivalentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Other Investment And Cash Equivalents [Member]</link:label>
    <link:label id="lab_rock_EBPOtherInvestmentAndCashEquivalentsMember_documentation_en-US" xlink:label="lab_rock_EBPOtherInvestmentAndCashEquivalentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBP, Other Investment And Cash Equivalents</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_rock_EBPOtherInvestmentAndCashEquivalentsMember" xlink:href="rock-20260626.xsd#rock_EBPOtherInvestmentAndCashEquivalentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rock_EBPOtherInvestmentAndCashEquivalentsMember" xlink:to="lab_rock_EBPOtherInvestmentAndCashEquivalentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTableTextBlock_019ea7a9-a80e-7c26-8f7e-5173f7280405_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule H, Line 4a - Schedule of Delinquent Participant Contributions</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTableTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Schedule of Delinquent Participant Contribution [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTableTextBlock" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable_019ea7a9-a8b3-7e6a-a6a5-b2478620511a_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Schedule of Delinquent Participant Contribution [Table]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Schedule of Delinquent Participant Contribution [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionTable" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanSubsequentEventPolicyTextBlock_019ea7a9-a80e-764f-a821-14fbcd6861b4_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanSubsequentEventPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Events</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanSubsequentEventPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanSubsequentEventPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Subsequent Event [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanSubsequentEventPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanSubsequentEventPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanSubsequentEventPolicyTextBlock" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanSubsequentEventPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock_019ea7a9-a8b3-7155-8089-94af9158f8d0_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TAX STATUS</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Tax Status [Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanContributionLineItems_019ea7a9-a8b3-70c4-a3db-ee63410fa187_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanContributionLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Contribution [Line Items]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanContributionLineItems_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanContributionLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Contribution [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanContributionLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanContributionLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanContributionLineItems" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanContributionLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage_019ea7a9-a8b3-7be8-b0eb-422effdf1c43_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum borrowing, to total account, percentage</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_rock_EBPRequisiteServicePeriod_019ea7a9-a80e-7809-89cc-3243ff3bcaec_terseLabel_en-US" xlink:label="lab_rock_EBPRequisiteServicePeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Requisite service period</link:label>
    <link:label id="lab_rock_EBPRequisiteServicePeriod_label_en-US" xlink:label="lab_rock_EBPRequisiteServicePeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Requisite Service Period</link:label>
    <link:label id="lab_rock_EBPRequisiteServicePeriod_documentation_en-US" xlink:label="lab_rock_EBPRequisiteServicePeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBP, Requisite Service Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_rock_EBPRequisiteServicePeriod" xlink:href="rock-20260626.xsd#rock_EBPRequisiteServicePeriod"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rock_EBPRequisiteServicePeriod" xlink:to="lab_rock_EBPRequisiteServicePeriod" xlink:type="arc" order="1"/>
    <link:label id="lab_rock_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm_019ea7a9-a80e-753c-89fd-66ae775b4b01_terseLabel_en-US" xlink:label="lab_rock_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Primary residence, borrowing term</link:label>
    <link:label id="lab_rock_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm_label_en-US" xlink:label="lab_rock_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term</link:label>
    <link:label id="lab_rock_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm_documentation_en-US" xlink:label="lab_rock_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_rock_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm" xlink:href="rock-20260626.xsd#rock_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rock_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm" xlink:to="lab_rock_EBPNoteReceivableFromParticipantAccountPrimaryResidenceMaximumBorrowingTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentInformationTable_019ea7a9-a8b3-7fb3-8c8f-b095c9c79b96_terseLabel_en-US" xlink:label="lab_dei_DocumentInformationTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Information [Table]</link:label>
    <link:label id="lab_dei_DocumentInformationTable_label_en-US" xlink:label="lab_dei_DocumentInformationTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Information [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentInformationTable" xlink:to="lab_dei_DocumentInformationTable" xlink:type="arc" order="1"/>
    <link:label id="lab_rock_EBPEmployerContributionVestingPercentage_019ea7a9-a80e-769f-ab04-3f5ee6a8780a_terseLabel_en-US" xlink:label="lab_rock_EBPEmployerContributionVestingPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vesting percentage</link:label>
    <link:label id="lab_rock_EBPEmployerContributionVestingPercentage_label_en-US" xlink:label="lab_rock_EBPEmployerContributionVestingPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Employer Contribution, Vesting Percentage</link:label>
    <link:label id="lab_rock_EBPEmployerContributionVestingPercentage_documentation_en-US" xlink:label="lab_rock_EBPEmployerContributionVestingPercentage" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Company contribution and/ or investment earning percentage vesting to the participant in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions, upon completion of minimum service period or attainment of maximum vesting age</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_rock_EBPEmployerContributionVestingPercentage" xlink:href="rock-20260626.xsd#rock_EBPEmployerContributionVestingPercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_rock_EBPEmployerContributionVestingPercentage" xlink:to="lab_rock_EBPEmployerContributionVestingPercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock_019ea7a9-a80e-781c-983e-7ca1bef66c67_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Notes Receivable from Participants</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Note Receivable from Participant [Policy Text Block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EbpFairValueInvestmentNavRedemptionNoticePeriod_019ea7a9-a8b3-775b-9ba6-3ec6f25b74e0_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EbpFairValueInvestmentNavRedemptionNoticePeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redemption Notice Period</link:label>
    <link:label id="lab_us-gaap-ebp_EbpFairValueInvestmentNavRedemptionNoticePeriod_label_en-US" xlink:label="lab_us-gaap-ebp_EbpFairValueInvestmentNavRedemptionNoticePeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Fair Value, Investment, NAV, Redemption, Notice Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EbpFairValueInvestmentNavRedemptionNoticePeriod" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EbpFairValueInvestmentNavRedemptionNoticePeriod"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EbpFairValueInvestmentNavRedemptionNoticePeriod" xlink:to="lab_us-gaap-ebp_EbpFairValueInvestmentNavRedemptionNoticePeriod" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_019ea7a9-a8b3-778b-9f17-bbca65e4cde7_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBP, Related Party and Party-in-Interest Transactions [Line Items]</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Related Party and Party-in-Interest Transactions [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_019ea7a9-a80e-73c8-bca0-a60bc26f5f96_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Level 3</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 3 [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel3Member" xlink:to="lab_us-gaap_FairValueInputsLevel3Member" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionNotCorrected_019ea7a9-a80e-7155-8751-4ec948f42604_verboseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionNotCorrected" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Participant elective deferral contributions and loan payments, failed to deposit</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionNotCorrected_019ea7a9-a80e-7f96-8238-e65be275c127_terseLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionNotCorrected" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contributions Not Corrected</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionNotCorrected_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionNotCorrected" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Schedule of Delinquent Participant Contribution, Not Corrected</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionNotCorrected" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionNotCorrected"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionNotCorrected" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanScheduleOfDelinquentParticipantContributionNotCorrected" xlink:type="arc" order="1"/>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019ea7a9-a80e-7f0f-b580-ff7bfade2eb5_totalLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net assets available for benefits</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019ea7a9-a80e-7c38-a5fb-3cf48db83ce9_periodStartLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning of year</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_019ea7a9-a80e-79e8-a263-1420b3fe5c07_periodEndLabel_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">End of year</link:label>
    <link:label id="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_label_en-US" xlink:label="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBP, Net Asset Available for Benefit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2026/ebp/elts/us-gaap-ebp-2026.xsd#us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit" xlink:to="lab_us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityDomain_019ea7a9-a8b3-795d-b814-760e921a2d11_terseLabel_en-US" xlink:label="lab_dei_EntityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity [Domain]</link:label>
    <link:label id="lab_dei_EntityDomain_label_en-US" xlink:label="lab_dei_EntityDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityDomain" xlink:to="lab_dei_EntityDomain" xlink:type="arc" order="1"/>
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