I understand they are a representation of a real GPS(apollo something), it even has a real world GPS data.

Yes It is . I use real world approach charts and am able to add all the waypoints with the fs 2002 flightplanner(just drag the route line to the appropriate waypoints on the approach) then use the database function of the gps and load the flightplan and fly the route drawn on the map veiw of the gps. It works excellent, almost like a poor mans fmc, I have not upgraded to the new version of the reality xp gps so Im looking forward to its added features. The new version has a feature where you can add custom user defined waypoints ,and also get a full map view mode like the real gx50

You might want to upgrade now! the Airspace Display is nothing short of amazing! and the new european waypoints for the GPS (today's file library at avsim - nice contribution from Egbert) are great!

I will upgrade this weekend, I just have been so busy lately ,Have not had a chance to download it yet.