When using GSX with the A320X for pushback the nose wheel rotates in the wrong direction. If I use the P3D pushback feature, the nose wheel rotates in the correct direction. The issue is only occurring with GSX.
The FS Labs use a custom nosewheel steering system, using their own custom variable, which interfaces with GSX so, GSX is setting the variable when its pushing, and the A320 code rotates the gear.
We made this code even before the A320 was originally released by FS Labs for FSX, and nobody ever reported a problem with it before so, the only possible reason for this, is they might have changed something in a recent update, since our code surely has never changed. Are you using the recent update for P3D4 ?