Is it possible to prefetch an area of Google Maps on a tablet? Suppose I wanted to download a particular state (of the U.S.) so that I could use GPS while not connected to wireless or 3G/4G on a tablet. Is this possible?
The device I have now is a Samsung T530NU.
I doubt downloading a whole state for offline use is gonna happen or allowed (or whether the size is gonna be that minimal) but it is possible to download map for offline reference. See Download an offline Map to learn how, from Google.

If downloading a whole state for offline use isn't happening, then you might wanna download all of it, however in smaller chunks/areas, and save them.