Whether you can use the same gateway for deposits and withdrawals depends on the casino. Some casinos strive to employ two-way banking options only, some provide as much as possible alternatives that do not always coincide.
The best way to go is to skim through the available depositing and withdrawal options and pick ones that satisfy you in terms of speed, fees, privacy, security, and bonuses. If you can’t decide on the best deposit/withdrawal gateway, feel free to consult with the customer support.