I need to convert a lot of garmin GDB files to GPX in order to convert it to another vector format. Is there any tools available can do a batch convert from garmin GDB files to GPX? Using MapSource allow only one file at a time.
You may use GPSBabel.
garmin GDB format is supported (see this page). Something like that should work:
A short batch file to loop through and convert all files in a directory: