in to other dimension/realities i.e what is happening? that means he know what is happning in jasons universe and the odds there are of another anubis being created.

I don't think he actually see's with his eyes, but more like he can sense things on other planes of reality.

and as for the odds of another Anubis being created, I think the chances are very slim, but thats the kind of question is for a more qualified reader to answer.

Anubis could and could not be created. Reason depends upon the circumstnaces of Gregs evolution. And yes i think he can learn about whats happening in other galazxies if he focuses his energy on it.