Check the box, it's really just used for statistical purposes after admission decision has been made. A few schools I've applied to had the responses to that section hidden from the actual PDF application being sent for the adcom to review.
I got a 164 and I have a 3.71 GPA. I'm in a grad program at Georgetown right now and was hoping to do a dual degree (could do it if I'm admitted this cycle) but it doesn't seem likely :/ Quite bummed.