I felt the same way. If you look at the FAQ section of the HBS 2+2 Program website, it says that due to difficulties assessing different GPA's there is no average. I think that they exclude this information not only because of their aim to attract as many applicants as possible but also because they're interested in engineering majors who typically have lower GPA's. As for the GMAT, the website says that the median is between a 700-720, but that they have no rigid cut-offs. Here's the link:
FAQ - MBA - Harvard Business School
That still doesn't provide much in the way of answering who got accepted, though. I've been trying to obtain as much information as possible, but have been striking out. I'm a sophomore at Notre Dame and strongly considering the 2+2 Program but I'd like to know what I'm getting into before I get my hopes up and, more importantly, spend time and money preparing for the GMAT. Let me know how the process goes and feel free to send me a PM thing.