Many Americans (and probably a lot of other people) use the term "gay" to describe things that they don't like, it doesn't necessarily reflect homosixuality in any way.
Also, really nice job on the Vault Boy model, it's really cool looking. As somebody else said, I would pay for one of those.
That doesn't fit with Fallout's setting at all though. In the Fallout universe, cultural things have a 1950's America-Retro-Futuristic theme, that includes the music, the prewar clothing, a lot of the expressions and sayings, and any leftover prewar technology.