Geez! Put away the stereotypes. Silicon Valley is not a Gay Mecca. In over 40 years here I doubt that I've seen as many as 10 "obviously" gay people, none of them coworkers.
Speaking more of California, which has the largest crowd of them in any state.
My birthplace Austin is now a gay mecca because of the influx of techies from the West Coast.
They sure as hell did not come from Texas.