(I have no proof of anything with Shaver. This is hypothetical discussion for the sake of discussion. Probably didn't need to be said, but wanted to make that explicit.)
First question: are you asking me if a person who went to Iowa or Wisconsin, then moved to the Twin Cities for work, built a career and raised a family here, and their kids went to the U is like "I've been a Hawk/Badger fan since (before) undergrad, but 40 years later my kid graduated from the U, so now I like the Gophers instead!"
It baffles me if you really believe that can be true.
Second question: it was mentioned that the Shaver Foundation donates to the U Cancer Center. ....... Where else would they donate?? You can't possibly tell me that a guy who has been a public figure in the Cities for many years is going to tell his foundation to not donate to the local group but to Wisconsin and Iowa instead?
That's not a thing. (I have no idea if he, personally, donates to the U (Cancer Center). That would be a much different thing.)
You posed the question of if a Gopher fan would donate to the U (Cancer Center) or Wisconsin. But that's assuming the thing that is in question, first. We don't know if he is a Gopher (athletics) fan.