As Bitcoin Gold has a subsequent pre-mine period, we do not yet know when the coin will launch. Bitcoin Gold does not launch immediately at the point when the chains diverge (block 491407). According to group representatives, the new Bitcoin Gold network is going to be open to the public by November 1st.

The ONLY thing anyone is able to do right now is trade Bitcoin Gold on exchanges that support it. You will not be able to mine, send or receive Bitcoin Gold until the mainnet is actually created.