panorama - How common is it for cameras to have a gyroscope?

How many cameras apart from the iPhone have a gyroscope for orientation?

Am I right to assume that there is a standard way to “tag” an image with the direction the camera was pointing in, as well as the GPS position?

Do any cameras have positional tracking better then a GPS?

I am thinking about a method to join photos when the subject does not have enough “random” detail for the current software.