GG-Tracker tracks your cellphone / mobile-device using GSM Cell-location or GPS. It displays your position on the internet using Google Maps. If only a GSM network is available to your cellphone it retreives your location from its self-learning internal database or through CellDB.org, if it has GPS available it will use that. This means that GPS is not required anymore for positioning, please check the explanation pages for more info.
Other people's implementations
It's nice to see that my software is actually used. Below is a list of all the people who have reported their usage to me, there might be many more out there. GG-Tracker is licensed under the GNU license, also known as open-source software.drop me a line.