Just a heads up:
As of Unity SDK version 0.14.40 released last Friday, there is now support for global interactors in the Unity EyeX framework classes.
There is a new scene called TraceEyeGazeScene showing how to access the latest gaze point from a script, using the EyeXGazePointProvider class.
The support for registering EyeXGlobalInteractor objects with the EyeXHost also makes it possible to implement streaming of other types of data (like fixations or eye position).
Please check it out, and let me know if you find it usable 🙂