Have a similar project, collecting sensor data(GPS, Temperature, Humidity, ect) send to server over GSM/GPRS or Phone-> Bluetooth, then send to python server, don't have google API for now but easy to add. Come with a software simulator so you don't have to drive to check or debug GPS data change. Also come with detail technique document and user guide. I can send most code and exe of the simulator if you give me your email.