What is GPX?
GPX stands for GPS Exchange Format. It's a light-weight XML data format for the exchange of GPS data (routes, tracks and waypoints) between applications and web services on the Internet.
Suffice to say it's the universal language of GPS, eliminating the problem of a each program having their own (incompatible) file format.
GPX allows you to exchange data with a growing list of programs for Windows, MacOS, Linux, Palm, and PocketPC.
GPX can be transformed into other file formats using a simple webpage or converter program.
GPX is based on the XML standard, so many of the new programs you use (Microsoft Excel, for example) can read GPX files.
GPX makes it easy for anyone on the web to develop new features which will instantly work with your favorite programs.