Not sure how exactly AI would handle this, but I think it would handle ok. However, the issue here was with the AFCAD itself, because the planes were placed in a completely opposite direction, so especially when talking about departure, you would load into the stand incorrectly, and I am not sure if GSX would actually move the aircraft to match the position created in the GSX.
So I think, that modifying the entire AFCAD is a better approach.
So no, the modification of the AFCAD was for the whole planes to be placed correctly, not just because of the GSX.