The OP could be one of those few applicants who gets admitted by the department, but then denied by the graduate school because of something. At many schools, the graduate school won't challenge a department on an offer of admission. But supposedly there are a few schools where the main graduate school is "strong," and the department's have less power. I think I recall Duke being an example of the strong graduate school model. Which kind of sucks, too, for this applicant since I think I receall Duke being strong on race/ethnicity stuff.
Anyway. I imagine some department will look past the undergrad GPA.