I did this by using the Garmin Connect app on my pc: sync the watch, go to activities, click on the name (“….raceqs racing”) and then when the map comes up, click on the gear in upper right corner, where there’s a menu that includes “export to gpx.” That creates a file which you can then upload on the raceqs page.
You can probably do this with the phone app too, but I prefer to play around with this stuff on the big laptop screen.
