I thought keeping bitcoin in bittrex will fetch me bitcoin gold as it gave bitcoin cash in the previous fork. but they have not yet credited bitcoin gold .i think those who had private keys with them they have claimed bitcoin gold successfully.
Yes, Bittrex will deposit BTG. But they will do it when they have a working wallet. So wait for Nov 1st or later, because not the network is up yet. Here is the statement from Bittrex and they will not open a BTG market.
https://support.bittrex.com/hc/en-us/articles/115002320451-Statement-on-Bitcoin-Gold-BTG-HitBTC and Yobit is already trading BTG, because they opened a market and credited people with BTG.