All docks are still there at JFK, just like as they were before in ParkMe.
However, they are now handled by GSX airport customization, which relies on the AFCAD. If you changed/removed the AFCAD supplied with JFK, or renamed it, GSX will still work, but you'll lose the customization, so it will behave like a default airport.
It's really suggested you use GSX at our airports with the AFCAD supplied with it, because we made the customization based on them, if you want to change something, start with the GSX-supplied AFCADs.