Here is a quick view of how gold and the S&P 500 have performed against a few commodities since peak GDP of 2007.
Gold Ratios
Except against the S&P 500 and gasoline, gold has done well against other commodities.
S&P 500 Ratios
Owing to excessive quantitative easing by the Federal Reserve, the S&P 500 has done quite well against commodities as seen in the table.