VismoX supports all the major heart rate sensors on the market, including Garmin. Your Garmin device will have an ANT+ ID ranging from 4-5 digits.
The way to find your Garmin ID would be the following 2 options.
1) Your club admin needs to Install the VismoX ID search app on the VismoX laptop. Then you have to wear your Garmin HR sensor and the search app will show the ID for you.
2) Use your Garmin bike computer or watch to search and find the ANT+ ID from there.
Once you find it you will need to go to your user settings and choose the VISMOX heartrate sensor type, and add the ID there. Push SAVE.
Next time you login it will be connected to your gauge.