The reason Thiel had a grudge against Gawker is perfectly valid, they outed him without his consent. And they have outed plenty of other gays for years quite irresponsibly. Yeah, good riddance.
I think Peter Thiel's sexual orientation is very much a public matter when he supports the Republican Party, one of the most virulently anti-gay parties in the West.
Exposing the hypocrisy of the rich and powerful is what journalists have always done.
Yes, so virulently anti-gay that Peter Thiel spoke at their convention and received a massive standing ovation when he took on the said party's stance on LBGT issues to their (read, Cruz delegates) faces.