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INVESTMENT IN GOLD - Changes in Ounces of Gold Held and Respective Fair value (Details) - Franklin Responsibly Sourced Gold ETF [Member]
 3 Months Ended 6 Months Ended
Sep. 30, 2025
USD ($)
oz
Sep. 30, 2024
USD ($)
oz
Sep. 30, 2025
USD ($)
oz
Sep. 30, 2024
USD ($)
oz
INVESTMENT IN GOLD [Abstract]        
Beginning Balance (Amount in Ounces) | oz 69,327.563 29,373.939 60,016.277 28,048.958
Beginning Balance (Amount in US$) | $ $ 227,910,897 $ 68,467,714 $ 186,956,705 [1] $ 62,110,210
Gold received for the creation of Shares (Amount in Ounces) | oz 29,318.609 3,336.631 43,320.19 4,672.095
Gold received for the creation of Shares (Amount in US$) | $ $ 107,852,712 $ 8,531,890 $ 153,402,627 $ 11,678,377
Gold distributed for the redemption of Shares (Amount in Ounces) | oz 0 0 (4,666.909) 0
Gold distributed for the redemption of Shares (Amount in US$) | $ $ 0 $ 0 $ (14,608,036) $ 0
Principal on gold sales to pay expenses (Amount in Ounces) | oz (25.991) (11.085) (49.377) (21.568)
Principal on gold sales to pay expenses (Amount in US$) | $ $ (89,364) $ (27,134) $ (165,925) $ (51,629)
Net realized gain (loss) from gold distributed for the redemptions of shares and sold to pay expenses (Amount in Ounces) | oz 0 0 0 0
Net realized gain (loss) from gold distributed for the redemption of shares and sold to pay expenses (Amount in US$) | $ $ 21,629 $ 6,556 $ 2,907,610 $ 11,770
Net change in unrealized appreciation (depreciation) on investment in gold (Amount in ounces) | oz 0 0 0 0
Net change in unrealized appreciation (depreciation) on investment in gold (Amount in US$) | $ $ 41,555,904 $ 9,018,985 $ 48,758,797 $ 12,249,283
Ending Balance (Amount in Ounces) | oz 98,620.181 32,699.485 98,620.181 32,699.485
Ending Balance (Amount in US$) | $ $ 377,251,778 [1] $ 85,998,011 $ 377,251,778 [1] $ 85,998,011
[1] Cost of investment in gold bullion: $286,845,363 at September 30, 2025 and $145,309,087 at March 31, 2025.