You would have to check the specs on each individual device, but all tablets should have GPS regardless of wifi, 3g or 4g capability. Besides theres no signals from my provider where I usually fish. Beechy to secratary. My 1st generation Samsung Galaxy works flawlessly.
Most tablets do not have a gps only iPads with 4g or 3G have a gps built in not sure about other brands
I have a Toshiba AT300. just installed navionics (already have it on phone). looks like everything worked, just have to see if this tablet has gps onboard...