This requires the plane to be pushed out of the gate, then does a turn to begin towing the plane forwards to the start line for an easy start and taxi out. Having such control would be great to have so gates like this can have proper pushbacks.
While push-pulls are surely planned, and will make it to GSX ( we only want to be sure it won't make editing them too complicated ), with the latest update, in which you can control the heading at each node of the path, with a proper positioning, it's possible to do that kind of reversed exits which were difficult to do with previous versions.
See the attached screenshot, and the attached GSX profile for Flightbeam KSFO HD, if you want to try it at G91, choose "Custom"