This format can...
File protocol for the Wintec WBT-201 / G-Rays 2™ GPS data logger. This format reads the binary file format created by Wintec's Time Machine X application.
Example 3.48. Command showing conversion of a Wintec binary file to GPX
gpsbabel -w -t -i wbt-tk1 -f tracks.tk1 -o gpx -F out.gpx