The ParkMe feature doesn't have anything to do with the default ATC, it's running on its own so, you have complete freedom were to park, and can park to a more realistic place, something that doesn't happen with the default ATC, that doesn't even recognize the airline tag for the user airplane. For the same reason, the Progressive taxi feature will not work if you want to park to a different parking spot than the one that the default ATC gave you.
The whole point of the ParkMe function is not there to help you finding you parking spot, but to help you parking there, once you decided were to park.
We were considering adding a way to locate the parking spot chosen for the ParkMe feature, replacing the default Progressive Taxi feature but, we weren't sure how this would have been received by the users, considering some comments we read about XPOI, and how is supposedly "not realistic", like the Progressive taxi is anyway...