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Statements of Changes in Net Assets (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Statement of Stockholders' Equity [Abstract]    
Opening balance (in Shares) 146,200,000 82,000,000
Opening balance $ 2,652,512 $ 1,195,897
Net investment loss (1,051) (588)
Realized gain on investment in gold 20,836 9,506
Change in unrealized gain (loss) on investment in gold $ (298,124) 59,879
Change in unrealized (loss) on unsettled creations or redemptions   $ (18)
Creations (in Shares) 3,400,000 18,500,000
Creations $ 60,968 $ 285,971
Redemptions (in Shares) (10,200,000) (5,700,000)
Redemptions $ (170,304) $ (82,715)
Closing balance (in Shares) 139,400,000 94,800,000
Closing balance $ 2,264,837 $ 1,467,932