BTG is scam coin, they will put malicious code into their wallet to steal btc btg, probably next update they will do that again
bitcoinwhoswho.com/blog/2017/11/16/million-dollar-mybtgwallet-scam/
as long as your bitcoin wallet is empty when you try to cash in it doesn't really matter any more. everyone who's anyone should know the drill by now.
and i'll guess most people are using coinomi. there's no point in messing around with a new wallet when that one does an ok job.