dual serial communication problem (GSM + GPS)

Thanks for the info. I see two routes to take. Cellular is one, the other is APRS and ham radio.

It isn't hard to get a ham radio license. And it is a standard data format. There are several sites you can use to track that data onto google maps.
http://aprs.fi/?call=a%2FN0KFB&mt=roadmap&z=14&timerange=21600