GSX works with my P3D v3.3.5
Then why you posted this in a thread that says GSX doesn't work and doesn't have anything to do with it ? In order to keep the forum clean, I splitted the post, so it will appear as a new thread with a proper title.
Since all my number key pad is mapped to EZdok, I can't use the number pad to move the service vehicles when in edit mode. I wish there was a way to do so, because I don't realize that there is a problem until I'm at the gate, and in order to remove EZdok assigned keys, I would have to keep going back to settings in P3D to change the key assignments. Frustrating for me.
So, the problem you are reporting, doesn't have anything to do with GSX. What's really happening, is that EZdok has taken over the numeric key pad.
As explained on the GSX manual, the vehicle editor keys are NOT special "GSX keys". GSX simply uses the default Slew keys, which means you DO have a way of changing them...using the DEFAULT Controls Settings page. Just assign different keys to the Slew Events. All the one used by GSX are indicated in the GSX manual, with the indication to which default Slew event they respond to.
Now, this is not guaranteed to work because, if EZdok ALSO intercepts the default Slew events (rather than reading the key itself), changing them won't do anything, since both GSX and EZdok will then continue to compete in the usage of the same (now different) keys.