v3.26.1
Combined Statements of Changes in Net Assets - USD ($)
 3 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Net assets, beginning of period $ 475,584,035 $ 186,935,761
Operations:    
Net investment loss (174,426) (84,273)
Net realized gain (loss) from gold distributed for the redemption of shares and sold to pay expenses 63,678 2,885,981
Net change in unrealized appreciation (depreciation) on investment in gold (60,141,655) 7,202,893
Net increase (decrease) in net assets resulting from operations (60,252,403) 10,004,601
Capital share transactions:    
Contributions for Shares issued [1] 0 45,549,915
Distributions for Shares redeemed 0 (14,608,036)
Net increase (decrease) in net assets from capital share transactions 0 30,941,879
Net assets, end of period 415,331,632 227,882,241
Franklin Responsibly Sourced Gold ETF [Member]    
Net assets, beginning of period 475,584,035 186,935,761
Operations:    
Net investment loss (174,426) (84,273)
Net realized gain (loss) from gold distributed for the redemption of shares and sold to pay expenses 63,678 2,885,981
Net change in unrealized appreciation (depreciation) on investment in gold (60,141,655) 7,202,893
Net increase (decrease) in net assets resulting from operations (60,252,403) 10,004,601
Capital share transactions:    
Contributions for Shares issued [2] 0 45,549,915
Distributions for Shares redeemed 0 (14,608,036)
Net increase (decrease) in net assets from capital share transactions 0 30,941,879
Net assets, end of period $ 415,331,632 $ 227,882,241
[1] Dollar amount of balance represents the cumulative fair value of creation of shares less the redemption of shares, at the time of the specific creation or redemption.
[2] Dollar amount of balance represents the cumulative fair value of creation of shares less the redemption of shares, at the time of the specific creation or redemption.