As far as I know the gateway has not been created yet for BCH, so for the time being I would not expect any withdrawal/deposit possibilities of BCH. If anyone has better information, then please correct me if I'm wrong.

With the upcoming release of microservices it will be easier to create gateways for new assets, and I understood that the devs will then also be able to set-up more gateways AND shorten the BTC withdrawal times with some other solutions.