I spend a good amount of time on bodybuilding forums...pink magic was hyped a lot before it came out, but once people got their hands on it the reviews weren't so good. The good reviews are related to strength gains and vascularity, but no one has mentioned anything about it making them more manly. It's really only effective as a mild workout supplement.
I had never heard about p6 extreme, but I did some research just now and it's even worse than pink magic. If you want links to some of the reviews/forum discussions of these products, pm me! But I'd advise that you stay away. Also scope out some of the biggest bodybuilding forums for threads about best testosterone boosters for women (since as anibioman mentioned, a lot of testosterone boosters are formulated to work with men's physiology).
GNC's not the best place to go for supplements. Online bodybuilding stores have the same things for cheaper, and overall better selections! Definitely check them out!