I figured at least some of y'all would find it useful. I know there has been a trick for years to download there offline maps but having it work on phones has been tricky for it working every time. It's nice that a lot of the new devices have dedicated GPS units and don't need the cell towers to work. I have one program now I use to have for back up of offline maps. I am sure the google maps will be updated more often.
I just ran into this also. http://www.gpsfiledepot.com/
looks like it may be worth a look for gps files in general.