What is the most up to date nav disc I can use in my 06 GX? From what I am reading its the 7.1? The "I agree" button gets old.

 

8.1 is the latest for all Gen 2-5 Navs, as far as I know. I am not sure if the 8.1 version for the Gen 4 Nav (the one I believe yours has) removes the "I agree" button. It does for the Gen 5s. It didn't get rid of it on my wife's Gen 3.