From OpenStreetMap Wiki
The Streetpilot series was made by Garmin for car navigation. They can be considered as the predecessor to the Nüvi series. None of the models appear to support saving track logs. However, they can use and display OSM Map On Garmin.
|Model Name||Can display OSM-Maps||Expandable Memory||Save track logs||Good Points||Bad Points||Detailed description|
||Recent OSM maps from mkgmap work, including routing. Load map onto card as /garmin/gmapsupp.img|