If, on a Mac, I right click on a pick in preview mode, I get a menu that contains "Set GPS Coordinates..." twice.
When I go to one of those for a picture that has GPS from the camera, PM6 doesn't seem to pick up the embedded GPS coordinates and give me the correct map and some text to describe the location. Instead it seems to think that the pics are taken in Oregon. ("Show Map" produces the correct location.). And yes, "sync map" & "sync gps" are ticked.
I like a workflow that readily identifies the location from the embedded GPS and places that resulting text into a field of my choice (ideally through a variable).