Unfortunately there are still some problems with GSX and your scenery.
After the last updated of GSX I noticed that when I ordered the "catering service", GSX was activated and the baggage loaders came to my airplane, but after a while there appeared an error and the information about created couatl.err. It turned out that the problem takes place at the stand 273 at your scenery. I checked some other nearby stand such as 270,271, 274,275, 279 and it seems that there is no problem. Furthermore I noticed that the problem at the stand 273 starts when the catering vehicle has to come to the airplane. Of course I wasn't able to check each stand, but reported this one to FSDT - below your may find their response:
"I'll check the AFCAD, they sent me the whole scenery to evaluate."
And the second one: "I've checked the parking 273, and sure enough, that parking has a bug, see the screenshot, the parking spot is not connected to the taxiway. I've found other problems like overlapping nodes too, GSX has some code to defend itself by such issues, but unconnected nodes are more tricky to fix automatically, it's something that must be done by the scenery developer."
Besides I've noticed that after departure when I try to activate GSX I have the message: "there are no parkings available at this airport". You may find the respective screenshots at the following location:
http://www.fsdreamteam.com/forum/index.php?topic=9184.0Can you investigate both cases and contact with FSDT?