Some schools will weigh the undergrad you went to in their consideration. UMDNJ told us specifically that the undergrad you went to was one of many factors scored in making a final decision. Unfortunately, with grade inflation these days it should be taken into account. I am not sure the fact the school is Ivy League or that it has a medical school attached to it has anything to do with this factor though. If an Ivy League, or any school, has a reputation for handholding and grade inflation then I am sure they will have a negative effect. In contrast, a local public school, like Rutgers for UMDNJ, who has a long history of failing anyone that deserves to be (and maybe some that don?t deserve to be) will help you.
Anyway, your GPA is fine. Hopefully you have the MCAT scores and activities to supplement them.