I guess the indication of the gates numbers, aprons , depends of the developers of the airport. GSX only read the files of the airports installed. There are a lot of airports, that even have GSX available at all of the gates. Sometimes the gates numbers, dont even match to the real numbers, because of the wrong GPS coordinates build by the developers of the airport. A clearly indication of this, is when align the IRS with the gate number, and it say ”Not in database”. So my guess is this is not an GSX issue,, because GSX does not modify any airport files.