Upload a trail from your Garmin to Wikiloc (Garmin Connect manual)
New Garmin devices like Garmin Edge 1000 and Forerunner 735XT automatically synchronize your recorded trails with Garmin Connect ™. Once you have finished recording your activity with your Garmin device and synced to Garmin Connect, log in to Garmin Connect on the web and export the GPX version of your activity. The action is hidden in the top right corner of the activity page as seen in the screenshot below:
Once you get the GPX file of your trail you can upload it into your Wikiloc account from the upload file page at Wikiloc.