My family doesn't really talk about "this sort of thing". One of my mom's cousins is gay, or at least my mom thinks she is, since she's lived with the same woman for more than a couple decades now. The story, as my mom knows it, is that her cousin was set to marry her boyfriend after high school (both she and my mom graduated in '60), but after high school, she called off the wedding and nothing else was ever really said. I don't know how long she and her partner have been together. Whenever I saw/see them, it was with the entire extended family (which is huge; my grandmother had 7 siblings). The family, as a whole, never really shows any PDA, so it wouldn't be obvious. Her partner is divorced with grown kids.
The family also has several males who are in their late 30's-early 40's and still unmarried, but that doesn't mean much, really. I'm #$%@ 34 and never been #$%@ married. But two of these guys I've never seen with with a girlfriend... one is in theater (so, if you want to follow the stereotype!) and the other I strongly believe has aspergers (which would tip the scales toward just being social inept).
Most of the rest are married, so we'd never know if they're bi or closeted.