Required Format (File=>Export=>Magellan eXplorist)
Magellan protocol (SD card) - Select this format for any Magellan that supports a SD card for waypoints
eXplorist POIs - Select this format if you have a Magellan eXplorist GPSr and want the waypoints to show as POIs (not as Geocaches)
eXplorist Geocaches - Select this format when you want to send down waypoints in the "Geocaching" mode supported by the eXplorist. GSAK will ensure the file has an extension of .gs and you will not be able to change the icon symbols (the symbol box is made invisible because when you request this format icons are automatically allocated by cache type and currently the Magellan firmware does not allow any other allocation of symbols)