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    <link:label id="lab_us-gaap_VariableRateDomain_9BEFEC50CB1B5E70B4676ABDE73BBFB4_label_en-US" xlink:label="lab_us-gaap_VariableRateDomain_9BEFEC50CB1B5E70B4676ABDE73BBFB4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Rate [Domain]</link:label>
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    <link:label id="lab_us-gaap_BaseRateMember_DB34C25F406473A8DEEF6ABDE73BCEF8_label_en-US" xlink:label="lab_us-gaap_BaseRateMember_DB34C25F406473A8DEEF6ABDE73BCEF8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Base Rate [Member]</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentLineItems_19C27D93C478AD7D27656ABDE73CED41_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems_19C27D93C478AD7D27656ABDE73CED41" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Line Items]</link:label>
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    <link:label id="lab_gntx_DebtInstrumentAdditionalBorrowingsAvailableFaceAmount_CDCCDCB461592FE5F5E26ABDE73CC7BA_terseLabel_en-US" xlink:label="lab_gntx_DebtInstrumentAdditionalBorrowingsAvailableFaceAmount_CDCCDCB461592FE5F5E26ABDE73CC7BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additional principal amount available</link:label>
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