Sorry for the delay.. I did realize that I had the DD Scenery still active in the SODE folder. I removed those and now rather than having gates fixed, its now showing the red X's.
Red X are NOT a GSX issue. Red X are created by SODE, to indicate an object ( usually a jetway ) that is created by a SODE XML file has been removed, so SODE can't find the objects, because you uninstalled the scenery.
Which seems to indicate you removed the scenery, but you failed to remove the SODE XML file. Note that, DD sceneries don't use XML files, but SDX files ( which are encrypted XMLs ), so you need to check both XML and SDX folders in the C:\ProgramData\12bPilot folder and remove everything related to KORD.