Do we have a miner for the Bitcoin Gold?
Use ZCash miner software.
Suggest to use Claymore Zcash Miner for AMD cards.
For NVidia I currently use EWBF Miner Version 0.3.4b.
Others may have better suggestions.
There is a Claymore Bitcoin Gold specific miner, at least that what is says it is (I don't see any difference between this one and the Claymore ZCash miner, other than the default config and epool files list BTG pools). I've tried it and it works fine.