Hmm I don't really see a problem with this tbh. Things will always be vaguely categorised and marketed more to one gender than another, for convenience if nothing else. Personally I think something like this:
http://www.johnlewis.com/ideas-for-b...toys/c60000990 is just quite a useful way of narrowing a massive range of items down to a few things that your typical young boy might like. Obviously its not a black and white thing where all boys are only going to like one set of toys and all girls are only going to like a different set, but it is fairly easy to make very general categorisations.
In the same way you'll get a lot of places offering 'gifts for Dads' with typical things like beer glasses, golf memorabilia, football items etc. Obviously not all Dads will want these items and not all the people who want the items will be Dads. My Mum is actually way more into sport than my Dad so among sport merchandise typically targeted at Dads I'd be more likely to find a gift for my Mum. But again they are very general categorisations, its basic marketing practices not an attempt to enforce a binary segregation of genders.