Touchpad GearVR Interaction

Hello good afternoon. I'm developing a project on Unity 5.5.2f1 (64 bit) and using OculusUtilities 1.16.0-beta and I'm not sure how to do the following:

I have a Canvas disabled on the screen and I want it when a person looks at an object (for example, a box) and touches the Gear touchpad, that Canvas is enabled, and when he clicks the Gear back button, the canvas is Disabled again.

Can anybody help me?

I'm using an OVRCameraRig camera, I also have a GazePointerRing in the scene too, besides the box with box collider.

Can anybody help me? What scripts should I put on the camera and so on to make this action work?

Thank you.