In regards to the GOR, you'd be a fool to think that lawyers for ACC schools aren't looking it over for loopholes. Once they've found it, and have built a strong enough case, that's when you'll see schools start to accept invitations to either the B1G or $EC. I don't remember exactly where it is, but I recall reading an article recently stating that one of the reasons that the ACC hasn't moved much is due to no school wanting to be the first to run to the courthouse. I say, if you've got good enough lawyers and a good enough offer, somebody's got to be the first.
Edit: Found the article, FYI requires a ESPN+ subscription to read.
https://www.espn.com/college-footba...latest-college-football-realignment-questions
"Ultimately, the ACC's binding grant of rights running congruent to the television deal that expires in 2036 is seemingly going to take ugly and aggressive legal action for schools to escape from. No one appears likely to be the first to run to the courthouse."