The problem is that GSX doesn't respond to key commands at these gates.
GSX responds, with a message saying the parking is too small. However, if you set the verbosity slider to the minimum, you won't see that message...
Is there a way to get GSX to work at a gate this small. Or have I missed something.Thanks for your help.
Of course there is, have a look at the GSX manual, Page 24, the explanation of the "Max allowed wingspan" parameter of the parking customization page. You will also want to enlarge the GSX Radius, in order to have the vehicles correctly positioned at start.