*A Gold has a separate check-in area, so when you get to T3 don't look at the screens for instructions on your flight's check-in area - instead ask for the *A Gold counters.
Being the best airport in the world by far, it probably won't make much of a difference as even the economy desks work swiftly. If you have the same luck as me last time around, it will take you 4 minutes from the moment you step out of the taxi to the time you clear passport control. Leaves a lot of time for consuming liquids in the KF lounge...