Question for the 777 guys:
Where is this GA button and how do you initiate the GA? It appears to me that a go around is the simplest thing to do: Kick the throttles to max. At least that's what you do in an Airbus. Seems to me that the so much preferred moving throttes do have some quirks involved. Even if you are on the ground you might have to be able to initiate a go around. It is after starting deceleration devices (brakes, autobrakes, reversers) you should not attempt it anymore.
Thanks for the answer.