Has this been done yet?
As I've said, it will come with the next update.
GSX with the CRJ is still an utter mess.
There's nothing in the current version that prevents users (or Aerosoft) to be able to create a working GSX configuration so, our update is required ONLY for those not wanting/not knowing how to do one.
The ONLY thing we'll add to the GSX code, is the ability to disable stairs without having to set them to zero height, because doing this will confuse SODE, and this requires a GSX update but, other than that, there are no issues using the CRJ with GSX, provided the configuration is correct, of course.