Is there such a thing as a GPS unit that uses Google Maps as its software? More and more I find myself turning off my GPS unit and just using Google Maps on my phone. I find Google Maps to be much more intuitive to use and it has more up to date road maps, even dirt roads. My only concern using Google Maps is I go to some pretty remote areas at times and I don't always have cell service. My GPS is a ten year old Garmin Zumo 550 that supposedly has the latest map updates, but I'm not so sure; routinely I travel on roads that show up on Google Maps but not on my Zumo. Thanks so much.