A tutorial detailing how to use Garmin MapSource to load maps to your map capable GPS unit such as the Gpsmap 60x(s)x, Etrex, Legend, Dakota, Oregon, Colorado, Montana, 62 series, and even the Nuvi. Jun 30, · How to add free topo maps to Garmin BaseCamp. Garmin BaseCamp is a great tool to view and organize your GPX files. The software comes loaded with basic maps that usually contain very little useful information. In this tutorial, I will show you how to download and install free (topo) maps to Garmin Basecamp. The entire process is quick and easy. Mar 11, · Free topo, trail and street maps for Garmin GPS handhelds, bike computers and wearables are an alternative to commercial maps! These OpenStreetMap based maps are free and available even for countries not covered by Garmin or other map providers/5(9). There are also options available for users of Garmin’s outdoor handhelds, and we’ve also put information together on free GPS TOPO maps. Download Free Maps for Garmin GPS. Garmin will give a free map to their customers as part of the nuMaps Guarantee program.