Can I visualize my tracks in Google Maps from my computer?

You can use Google Maps to view your track by emailing the track to yourself, then you can view the track in Google Maps by either clicking the live link embedded in the email, which will be active for 7 days, or by importing the KML file into a new Map created under the “My Maps” link. If you have Google Earth installed, simply drag the GPX file onto the earth to see your track.