This site is being deprecated.
Please see the official X‑Plane Support page for help.
The only submission for inclusion in the default sim was created a couple years ago. Addons created for X-Plane 10 will work in X-Plane 11. It would not have the newest features, such as service vehicle routes, but the buildings should still show up. This might be your best option until someone submits updated scenery for the Gateway.
This site is no longer being actively maintained.