While George Takei is an openly gay man sounding the call for LGBT rights in real life, his most famous character, Hikaru Sulu, was never technically given a sexuality on the original Star Trek series or its subsequent films.
But today, all that changes.
New Sulu John Cho revealed in Australia's Herald Sun that his Sulu would be not only gay, but also married with a daughter! As to the shape this aspect of Sulu's life will take, Cho reveals, "I liked the approach, which was not to make a big thing out of it, which is where I hope we are going as a species, to not politicize one’s personal orientations."
So, Sulu's queerness will probably not be a crucial part of the story so much as a simple fact that gets revealed as the events of Star Trek Beyond unfold.
This might seem like a huge deal (and it is), but let's not forget that, while there has never been an out gay character on Star Trek before, the franchise, itself, is a huge part of LGBT fandom. Slash fiction, itself (that being fan fiction which pairs two straight characters in a homosexual relationship), is rooted in Star Trek fan zines. And Gene Roddenberry, himself, cited Alexander the Great and Hephaestion as his influence on the Kirk/Spock relationship. Just to connect those dots, Alexander the Great and Hephaestion were pretty gay for each other.
None of which touches on pairings like Bashir and Garak, Seven and Janeway, and Picard and Q, all of whom were heavily implied to have had relations that went beyond friendship.
It's all very Wizard of Oz -- after this long road it turns out that Star Trek had the gay inside it all along. Nonetheless, this news is still very cool.