As a current GSPP student, I can say that you should apply to your top choice(s). A relative encouraged me to apply to Berkeley; I would not have done so but for her advice. I have multiple degrees, so my undergrad GPA may not have been too important to them. I think they are more interested in a the whole package (1) GPA and (2) experience. If you have a high enough GRE score, you may be eligible for a fellowship. I know that Berkeley is trying to increase its international focus. I would strongly recommend applying to GSPP (or wherever your top choice(s) is/are). At least attempt 1 or 2 longshots.