Well that was easy! 🙂
Dropped the gson jar into the add-ons folder, and OpenGarage binding is there now. Set up OpenGarage settings and now I have a switch for my garage door as well as distance measurement on my sitemap! Thanks @psmedley for building this binding!
Now I just need to see where I can get a longer piece of the white control wire as I want to mount my OpenGarage device closer to the beginning of the actual garage door for better accuracy.