I have bitcoin on my blockchain wallet and bittrex account. But i dont get BTG because they dont support BTG, But my friend put their btc on yobit and hitbtc they get BTG. I dont know why bittrex dont support BTG.
I feel your pain brother

I had Bitcoin on Bittrex when the fork happened and I am still waiting for Bittrex to give me the Bitcoin Gold they said they would.
I've a feeling they are waiting until a secure wallet and replay protection has been sorted.