So you're saying that ground works 100% independently of tower and has no idea which runway is in use? Or are you just able to put it down on the numbers and make the taxiway immediately to your left or right?

As for the non-movement area being adjacent to Alpha, wouldn't you call that "the ramp" or some other locale rather than alpha, since you're not technically on alpha? Also, when you put it in context, you'd likely say "N12345, at ramp taxi with Golf" or whatever ATIS, which would infer you're departing. Unless you guys like to repeat the ATIS code to everyone you talk to?