Speaking as a gay man, I think a pink plane marketed in the right way will appeal to the gay community, which is no bad idea, as gays have a higher average disposable income than straight people.
The gay community are very responsive to self-styled identity semiotics, which is essentially what a pink plane is catering to. This is hardly homophobic sterotype setting, but rather the result of a minority group's indentity formation. So chill out mate, a pink plane would be a big turn off for me, but many gays would simply love the idea.