Does an object have a on Gaze method

Mixed Reality Academy from Microsoft is a pretty good place for some basic tutorials on the topic, one of which includes gaze scripting. I ran through them myself and found them quite helpful. You can find those here: https://developer.microsoft.com/en-us/windows/mixed-reality/academy

Note, we (Unity) don't directly support those tutorials so your mileage may vary if scripting has changed since they were posted. Hope that helps!

 

Just adding some more info

Most object come with a collision detection via the mesh that is created with the object, best way to see this is creating a primitive object. You can use physics ray cast to see if you are colliding with an object, then have a function on the object that will detect when a collision happens.

Here are some links to help on the API side:
https://docs.unity3d.com/ScriptReference/Collider.OnCollisionEnter.html
https://docs.unity3d.com/ScriptReference/Physics.Raycast.html