I had btc in Mycellium during fork. I used Mycelium's seed in Coinomi to claim Gold there.. Instructions are online. From Coinomi I transferred Gold to HitBTC and traded them to BTC.

So it all depends where you had your BTC during fork.

Ps. Coinomi is legit, but there are scammers which  try to pose as Coinomi. Please see
https://twitter.com/coinomiwallet/status/930247727774158848