A number of the WaypointsDotPH contributors and egroup members have been making comprehensive Garmin-compatible maps mostly from data contributed in this website and they have been offering these maps to public for free.

Below are the links to their web pages where you can download the maps:

osmphil_garmin -- Routable map compiled by Maning Sambale from openstreetmap.org data

roadguide.ph -- Routable map maintained and compiled by Jan Vanslembrouck

RPMap - Garmin compatible map available from the mapmakers forum run by Louie Galvez

If you like to learn how to create your own Garmin GPS Map from Openstreetmap data ... click here