Users are responsible for covering all gas fees required to use the exchange. The Gas fees are paid directly by the user. On all transactions, deposits and withdrawals, the user himself pays the gas fee to the network. This includes both gas fees for trades, paid for by the taker, paid by the maker and gas fees for withdrawals. The Gas Price is calculated through the Ethereum Network where the Standard Cost for Transfer is $0.092 which is variable and may change in accordance with the Ethereum Network Conjunctions.
You can check the current gas price on https://ethgasstation.info/.