DIY - build your own GPS tracker

“The Open GPS Tracker is a small device which plugs into a $20 prepaid mobile phone to make a GPS tracker. The Tracker responds to text message commands, detects motion, and sends you its exact position, ready for Google Maps or your mapping software. The Tracker firmware is open source and user-customizable.”

Open GPS Tracker

It uses a GPS module, a microcontroller, some code and a cheap phone to act as a communication link.

If you don’t want to DIY, you could try something like this:

For more info see: How GPS works

[See previous DIY]