Hi @ranaelbastawisy and thanks for your query. Indeed, you can implement Gaze Aware Non Player Characters in your application using the Tobii XR SDK.
We discuss this feature @ https://vr.tobii.com/sdk/design/use-cases/social/basics/
You can download the XR SDK freely @ https://vr.tobii.com/sdk/downloads/ Please do check it out and let us know if you any further questions.