All Gold ETFs allow taking physical Gold delivery (given the criteria of holding a certain number of units is met (normally totaling 1kg & above)). Procedure for redemption of units into physical gold for various ETFs can be found in their Scheme Information Documents (linked below) -
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Nippon Gold ETF - https://www.nipponindiamf.com/InvestorServices/SIDETF/NipponIndia-ETF-Gold-BeEs.pdf (Page 30-31)
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SBI Gold ETF - https://www.sbimf.com/en-us/lists/sid_kim/sid%20-%20sbi-etf%20gold.pdf (Page 22)
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HDFC Gold ETF - https://files.hdfcfund.com/s3fs-public/SID/2020-07/HDFC%20Gold%20ETF%20(SID)%20-%20May%2029%2C%202020.pdf (Page 33)
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UTI Gold ETF - https://docs.utimf.com/v1/AUTH_5b9dd00b-8132-4a21-a800-711111810cee/UTIContainer/UTI%20Gold%20Exchange%20Traded%20Fund%20-%20SID%20201920190617-061429.pdf (Page 21)
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Kotak Gold ETF - https://www.kotakmf.com/FundDetails/View?filePath=RDpcSWRlYWxha2VcS290YWtNRlxGaWxlc1xFc3NlbnRpYWxQREZcU0lEIC0gS290YWsgR29sZCBFVEYucGRm (Page 11)
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Axis Gold ETF - https://www.axismf.com/axisdownload/sch_info\\Axis%20Gold%20ETF%20-%20Scheme%20Information%20Document.pdf (Page 24)
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ICICI Prudential Gold ETF - https://www.icicipruamc.com/docs/default-source/default-document-library/gold-etf_sid.pdf (Page 43-44)
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Aditya Birla Sun Life Gold ETF - https://mutualfund.adityabirlacapital.com/-/media/bsl/files/resources/forms/sid----scheme-information-documents/sid-absl-gold-etf-3105.pdf (Page 16)
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IDBI Gold ETF - https://www.idbimutual.co.in/Pdf/IGETF_SID_2020-01-July-2020-1014737876.pdf (Page 29)
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Invesco India Gold ETF - https://www.invescomutualfund.com/docs/default-source/default-document-library/invesco-india-gold-exchange-traded-fund---april-27-2020.pdf (Page 29)
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Quantum Gold Fund ETF - https://www.quantumamc.com/scheme-information-document-forms/quantum-gold-fund-etf/form-106 (Page 34)