This is the command garmin_gmap that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
garmin_gmap - convert .gmn files into xml data for use with goole maps
garmin_gmap reads a .gmp file as produced by garmin_save_runs, and writes to standard
output the encoded polyline representation (for Google maps) along with other information
such as the start and center latitude/longitude, and the lat/lon bounding box.
Use garmin_gmap online using onworks.net services