All the GAS ( previous called ANC) has been listed on your account. You can check it in the Distribution History of Account Center.
To know more about how Binance distributes GAS to NEO holders? Click here
Meanwhile, Binance will support to trade GAS/BTC on 7th of August, 2017 Beijing time.
You can transfer and withdraw Gas from August 3nd.
Thanks for your support!
August 1st, 2017