Thank you for sharing the video and your code. It will be interesting to follow your progress of migrating from Gaze SDK to the EyeX SDK. Please share your progress in the Community Projects forum if you want.
Actually, the current version of the EyeX SDK is compatible with the Tobii REX hardware (if you have the latest firmware), so if you already have a REX you can start migrating right now. There are many features in the EyeX SDK that we think you’ll find useful, even though the EyeX SDK is designed mainly with multi-modal interaction in mind.