We have our gay music, gay design, gay movies and gay clothing — all suitably fabulous, of course. We have gay houses, gay neighborhoods and gay cruises. But what about those four-wheeled American icons: cars and trucks? What’s gay about them? Plenty, if you know what to look for. And if you want to accessorize your fabulous gay lifestyle with the appropriate mode of transportation, it’s easy to do so by following a couple basic rules of thumb. First, the