It's not so simple...
Pushback vehicles have different wheel steering modes. Sometimes the wheel steers like a car (when they drive around the airport), sometimes they steer opposed (to increased the turning radius), sometimes the wheels steer all in the same direction (to translate), and the driver can change the steering mode depending on the situation.
We might be able to simulate this too, in future GSX version, but for the time being, the current solution is correct.
