Convert GPX (.gpx) to Garmin MapSource (.gdb)

RouteConverter opens GPX files and saves them as Garmin MapSource — free, offline, no upload required.

How to convert .gpx to .gdb

1. Open the .gpx file via File → Open.
2. Pick Garmin MapSource in the Save as dropdown.
3. Choose where to save it via File → Save as.

About GPX (.gpx)

GPX (GPS Exchange Format) is an open XML format for waypoints, tracks and routes, with optional time, elevation and extension fields. It's the universal GPS interchange format — read and written by Garmin Connect, Google Earth, OsmAnd, Strava, komoot and nearly every GPS app or device made since 2004.

About Garmin MapSource (.gdb)

GDB is the binary database format from Garmin's legacy MapSource desktop software, bundling waypoints, routes and tracks in one file. Written and read by MapSource and, via GPSBabel, by newer Garmin tools that need to read old MapSource archives.

Download RouteConverter — Windows, macOS, Linux, free.

Related conversions

• Garmin MapSource to GPX
• CoPilot to GPX
• CSV to GPX

FAQ

Can RouteConverter convert .gpx to .gdb for free?

Yes. RouteConverter is free and open source. Opening a GPX file and saving it as Garmin MapSource does not require an account, a subscription, or an internet connection.

Does the file get uploaded anywhere?

No. RouteConverter runs on your own computer (Windows, macOS or Linux) and converts the file locally — nothing is sent to a server.

Can I convert .gdb back to .gpx?

Usually yes — open the Garmin MapSource file and pick GPX in the Save-as dropdown. Fields the target format cannot represent are dropped with a warning.