The touch pad on the Gear VR seems super handy and I definitely want to use it. I don't have a Gear VR to test it with, however.
So I've tried to make a basic menu with Unity's UI system using the touchpad as input. I thought, maybe someone can test it and if it works, maybe other people will find a use for it as well. 🙂
It's a basic menu with a couple of buttons that can be double clicked and scrolled trough with the touch pad. It also has a button for the universal menu and it will open the universal menu when the back button is held. The documentation seemed to imply it was mandatory to have that. As far as I could test it myself on an Android phone, it seemed to work.