Unless I'm mistaken, it seems like there's no way to customize a parking spot at your destination while you're in cruise. I feel like this ability would greatly improve GSX. I just did a flight and all of the settings for the gate were wrong, so as I'm trying to clean up the airplane after landing, navigate the taxi ways, I'm now having to pause and go into GSX to change the gate settings, restart Couatl, THEN finally un-pause. I wish I could open the customization menu in cruise, search for my destination airport, and make the changes I need to make while there's downtime.