Anonymous wrote:OP -- I assume your question is well intended but it's pretty meaningless without context -- depends on rigor of course work, test scores, public/private school, weighted/unweighted GPA, how it compares with other students in that school in terms of class rank, and, I would argue, there is no such thing as "no hook" in the sense that just about everyone admitted to the most selective ivies has something special /unique about them besides their grades and SAT scores. Beyond that, there is a wide range of selectivity within the ivy league itself even though all are highly selective.
If your school has Naviance you can see the GPAs of admitted students to different ivies from your child's high school. Otherwise, check out the common data sets or third-party web sites. Good luck.
Don't over think it. I'm just trying to get some data points. I've seen GPA's belwo 3.5 on Naviance, but Naviance doesn't flag "hooks" - I assume anyone getting in with less than a 4.0 has something extraordinary, but the real outliers are the three "hooks" - what I'm looking for is the minimum GPA to have a chance at ANY Ivy. If someone were to say "3.2, but the student was accomplished actor" - that would still be useful.