Quote Originally Posted by jdowney83 View Post
You were able to load the map on your wifes head unit using the unl and gma file that was created for your own head unit? ...
The short answer is Yes.

Does anyone know how to read the .gma file? When I open it with notepad, I can read "Garmin GMA" at the beginning and the rest looks like a gibberish cluster of characters. The .unl file is some kind of serial number or key. I used to have an SD card with the older map prior to 2013.20 but I seem to have misplaced it.

jdowney83: Would you mind trying to load the map without those 2 files? If it won't work, it should simply going to report that the map is not compatible and it shouldn't make any changes on your files - at least that was my experience. I'm curious if, since I had them in there when I loaded the map, if it created some type of association.