Thanks for all guides and info. If GPX file content is the same format as GPI, then how to load gpx to GPS?
I copied gpx file to several folders of Garmin, but GPS still didn't show any POI's.
Is there a special folder or file header in order Garmin to load it as POI?

I need it for both Garmins - Nuvi 1340 and Oregon 550.

Thanks