"Political correctness" is mainly a pejorative coded expression to classify anything liberal or multicultural in a negative way. The attraction of the expression is that its user appears to be something of a free thinker, a rebel, in not conforming to a "correct" (but corrupt) agenda.
The reality is that most of those things deemed "politically correct" have marginalized status. Thus to call showing a program with gay parents "politically correct" ignores the fact that, however "correct" you may think it wants to represent itself, gay people still have secondary status. (The irony ought to be obvious: In about 12 states, sodomy is still illegal and yet people in those states can turn on the television and watch Queer as Folk.)
Some of the criticism dumped under the label "politically correct" is warranted, no doubt -- like the bizarre use of hypersensitive language in the early 90s, a pretty dead movement by now -- but the term has become such a predictably broad way of condemning anything of multicultural sentiment that its use almost always indicates the user's own effort at thought control.
This may stun you Warik, but television producers long refused to produce gay programs. I don't think my community spent much effort opposing that. We instead focused on specifically negative depictions which, in the absence of favorable depictions, became viewed as factual. As for children's shows, we've already begun our insidious takeover via the Teletubbies. As long as "your people" have Jerry Falwell, I think you're safe.
Picture of young homosexual with the well-known gay recruiter, Tinky Winky, modeling position for highly impersonal sodomy, otherwise known as "pillow biting":
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