In 1905, gold averaged $21 an ounce — about $780 in today's money. That was up 0.0% on the year in nominal terms (+1.2% after inflation). The dollar was still defined as a fixed weight of gold under the classical gold standard, so the price barely moved from year to year — gold *was* money, not an investment that rose and fell.
To see 1905 in the full sweep of the gold price, explore the 768-year ribbon, or find out what a 1905 gold investment would be worth today on the gold calculator.