Custom GPS navigation routes, also referred to as point-of-interest files or POI files, typically provide directions for special tours, tourist attractions, restaurants or destinations that are off the beaten path. You can download custom routes to your Garmin Nuvi GPS, but you need to understand what’s necessary. A custom route must be formatted in GPX format, and you must have Garmin’s proprietary POI Loader software downloaded to your personal computer. Writer Bio
