Magellan Explorist Geocaching (maggeo)

This format can...

This format support the on-card format used by the Magellan Explorist 400, Explorist 500, Explorist 600, Explorist 210, and Explorist XL to describe geocaches. Notice what while the format can hold an infinite number of geocaches, the unit will read and silently discard all but 200 geocache POIs at a time.

You should name any file created with this format with a ".gs" extension so the firmware can read it.