I received one of the invites to interview an Brandeis, and I have a 3.97 GPA, I didn't take the GREs, and I have about 1.5 years of research experience with no publications yet. I do have two publications being prepared, but I won't be first author on either. I was honestly pretty surprised to get an invite, since even though my GPA is pretty high, I don't have that much research experience. I hope that helps, and good luck with your applications!