Super low cost of living on a tech salary? Sounds good to me. But if that doesn't work GM has the Cruise offices in San Francisco that they'll have to find some use for. GM proper also has offices in North Hollywood and Pasadena. Cadillac famously used to have offices in New York for the prestige, but Cruise still does AFAIK.

I'd bet that the problem is absolutely going to be more of a bureaucracy and salary issue than a location one. GM is a hilariously broken company and I can't imagine an enjoyable one to work for.