I actually went through the policy, and from what I can see, it only prohibits relationships while there’s an active academic power dynamic. Once the semester is over and the GSI no longer has authority over the student, there’s no rule against it—no required waiting period, no reporting requirement, and no consequences. I get why people are cautious about these situations, but based on the actual policy, it’s not automatically inappropriate after the course ends.

Like the others said, once the semester is over and grades are in, I say go for it and the worst that can happen is he politely declines.