Garmin satellite navigation systems are capable of using GPX file formats for Points Of Interest (POI) files, but not directly.
You have to download their free POI Loader, install it to your PC and then use that to convert the LPGMAP GPX POI to something your Garmin will understand. There are also full instructions on how to install the application as well as use it on the Garmin website.
To download Garmins POI Loader click the button below.
When you have finished, just close the browser window and come back here to complete the POI download.