I can see that something has changed, since I ,too, can no longer make the latitude, longitude location entry into the Get GPS field and get a result. This was not the case when I first made the post. I have been through two PM program updates since that time, so presumably there was a revision to the way that entry is handled by PM. Even though a precise GPS location is not always required, given the circumstances, no answer is better than an incorrect one.
However, that is not the true issue I was trying to resolve. It was the convenience of making a single copy and paste to enter all the GPS information into PM if one already has obtained it from Google Maps. When one makes a right click on a Google Map and selects "Whats Here?", a popup shows the latitude and longitude respectively in the format "xx.xxxxxx, yy.yyyyyy" (negative signs permitted). Copying this into a Google Maps search box is recognized on their web interface. It would be convenient if PM accepted a similar entry into the 'GPS Coordinates' box on the 'Set GPS Coordinates' form rather than having to divide that information up into four separate entries. A search for the coordinates is not required, since they are already known. I use Google Maps to search for the coordinates when I don't have an address, but do know the general location. The search tools are more robust with that software.