It could be argued that gold is priced somewhat arbitrarily, based on market demand as a store of value -- exactly like BTC. However gold is a physical product and has real-world uses as an element.
With all that taken into account, will the market drive them to general parity? Like the Euro/Dollar?
Parity is impossible between Bitcoin and gold because they're not measurable against one another. We measure gold by weight (troy ounces). In raw transactions, we measure bitcoins by satoshis (0.00000001 BTC). If 1 BTC = 1 troy ounce of gold, there's no element of parity. It's just an arbitrary comparison. We also have no idea what the total supply of gold is, so we can't compare parity as a measure of purchasing power vs. total supply.
This is like asking if beer and cannabis will be driven to parity because they're both consumable goods.