I've tried a few searches and haven't found one, but some of the concepts have cute TV Tropes titles that make them hard to find.
The only way to ever find anything on TVTropes is to go to the page for a game/show/whatever that you know uses the trope and search for it. Maybe try that? I'd help, but I can't think of a game with gender-exclusive equipment right now.
All the Suikodens do. Xenosaga III has a few items that can either be shared between the female humanoids (Shion and MOMO) or the boy humanoids (chaos and Jr.). A few low level items can be shared between Jonathan and Charlotte in CV: PoR, but the heavy armor and frilly dresses are exclusive to one or the other.
I only brought up TV Tropes because it seems like a few GB concepts borrowed their names from there. Drives me batty.