Investment in Gold - Schedule of Changes in Ounces of Gold and the Respective Fair Value (Details) - Gold [Member]	6 Months Ended	12 Months Ended
	Jul. 31, 2025 USD ($) oz	Jan. 31, 2025 USD ($) oz
Schedule of Changes in Ounces of Gold and the Respective Fair Value [Line Items]
Beginning balance, Ounces | oz	469,450	383,204
Beginning balance, Fair Value | $	$ 1,314,597,403	$ 780,184,353
Gold bullion contributed, Ounces | oz	69,894	89,807
Gold bullion contributed, Fair Value | $	$ 224,425,657	$ 227,982,044
Gold bullion distributed, Ounces | oz	(3,582)	(3,561)
Gold bullion distributed, Fair Value | $	$ (10,926,272)	$ (9,295,825)
Realized gain (loss) from gold distributed from in-kind, Ounces | oz
Realized gain (loss) from gold distributed from in-kind, Fair Value | $	$ 4,040,610	$ 2,788,531
Change in unrealized appreciation (depreciation), Ounces | oz
Change in unrealized appreciation (depreciation), Fair Value | $	$ 231,080,838	$ 312,938,300
Ending balance, Ounces | oz	535,762	469,450
Ending balance, Fair value | $	$ 1,763,218,236	$ 1,314,597,403