Anyone can say anything on the internet, but when the rumor is so dumb even the KOS people don’t buy it (and they will buy almost anything against a Republican) you know it doesn’t have legs. Normally Perry is lambasted for not being ‘gay friendly’. The SPLC just trashed him for inviting pro-traditional marriage groups to the State prayer meeting. They libs can’t have it both ways.
I’m a long ways from Texas politics and so I have no clue. But it certainly is not only consistent with outed Republicans (and preachers) in conservative states often to have been especially antigay in their rhetoric (as I believe Perry has been), but it is that supposed hypocrisy that liberals quote in going after them.
That doesn’t mean there’s enough true or false to the rumor for it to be used successfully against Perry. And I believe you’re saying there’s not enough for them to profitably take issue with.