Apparement ce serait le 28 mars 2003 si on en croit : https://www.marketwatch.com/story/how-gold-etfs-have-transformed-market-in-10-years-2013-03-29

On March 28, 2003, the first gold-backed ETF, developed by ETF Securities, was launched. It trades on the Australian stock exchange as the ETFS Physical Gold GOLD, +0.03% with assets under management at about $602 million.