Hey Carlos,
Jenny is on holiday today, so I’ll answer for her.
As she said, we will add code examples demonstrating how to use the EyeX SDK for Unity with the new GUI system. We just cannot do it right now. Meanwhile, maybe you can get help from someone else on this forum or within the Unity community.
Regarding PlayMaker support for the Tobii EyeX SDK, it has been discussed in the PlayMaker forum. Please vote for it!
Happy New Year! See you in 2015