Convert your GPS waypoints and tracklogs to KML in two easy steps with ExpertGPS. Download your GPS tracklog and waypoints, and then press F7, the View in Google Earth command. ExpertGPS will convert your GPS data to KML and automatically zoom to the KML data in Google Earth's map viewer.
ExpertGPS does a much better job converting GPS data to KML than other GPS to KML converters, because ExpertGPS creates custom KML files for every GPS receiver, so the KML placemarks in Google Earth have the exact same icons as the waypoints did on your GPS receiver. For example, here are the KML placemarks displayed for a Garmin nuvi:
Unlike other GPS / KML converters that can't upload and download your GPS data, ExpertGPS can also send KML directly to your GPS receiver. You can copy and paste placemarks and driving routes directly from the My Places folder in Google Earth into ExpertGPS, or use the Import Command on the File Menu to open any KML or KMZ file. Then just click Send to GPS to send the KML file to your GPS.