You can create a real-time GPS tracker using Google Maps API. Don’t worry about having a GPS device, you can emulate a garmin using GPSGate. Then later you purchase fancy gps devices and a JunxionBox…All with free software too. Link.
Editor at large – Make magazine. Creative director – Adafruit Industries, contributing editor – Popular Science. Previously: Founded – Hack-a-Day, how-to editor – Engadget, Director of product development – Fallon Worldwide, Technology Director – Braincraft.