Gay characters in the Marvel Cinematic Universe are as rare as non-closeted gay men in Tuscaloosa. Writers, editors, producers, and corporate suits think that the movies are for kids, and kids must not become aware that LGBT people exist; or they're worried about homophobic audiences rushing from the theaters in disgust. Sometimes there are momentary "blink and you miss it" glimpses of LGBT potential: a lesbian couple will hug amid dozens of other characters in a closing shot, or Loki will state that he's been with men and women both, while falling in love with a woman.
The premise: M.O.D.O.K. (voiced by Patton Oswalt), a Mental Mobile Mechanized Organism Designed Only for Killing, looks like a giant floating head with tiny arms and legs, although when his suit comes off, he looks like a regular human with a gigantic head. He is trying to balance his schemes for world domination with the obligations of his nuclear family: estranged wife, fashion-and-boy-obsessed teenage daughter, and weird 12-year old son (Ben Schwartz, top photo). The claymation is reminiscent of the old Davy and Goliath show.
There is a lot of claymation beefcake, and MODOK frequently expresses an admiration for the male physique. However, this seems to be indicating the supervillain's stupidity rather than implying same-sex desire: "MODOK is so dumb that he doesn't know he's looking at a guy!"
Son Lou also has some gay subtexts. He's "weird" -- into magic, not into sports. He states that only in Asgard can he truly be himself, similar to LGBT people abandoning their homophobic small towns for a gay neighborhood. But he writes erotic poetry about the Green M&M (the lady), so he's canonically straight.
On to the gay representation of Gary -- or lack thereof.
Episode 1: After several failed world-domination schemes, MODOK goes broke, and is forced to sell his supervillain company, AIM, to a tech corp. The blond metrosexual Austin (left) becomes his boss.
Gary, not yet named, appears as one of the anonymous minions, who always wear hazmat suits. While he is getting coffee, a misdirected ray blasts his arm off. "Sorry, I thought the coffee was for everyone."
Episode 2: In order to win back his estranged wife, MODOK goes back in time to take her to an important concert.
Minion Gary is holding a highly radioactive crystal. MODOK tells him that he's now sterile, his balls are "just for show," he'll never have a family. Obviously he assumes that Gary is heterosexual.
Episode 3: MODOK and the wife and kids go to a leadership workshop. Gary does not appear.
Episode 4: Instead of supervillains, MODOK is stuck hanging out with small-time street thugs. Gary makes standard henchman comments.
Episode 5: MODOK and Monica team up to regain control of his supervillain corporation. Gary appears briefly, making more standard henchman comments.
Episode 6: MODOK and his wayward son go to Asgard, and end up in a war between the Asgardians and the Kobolds. Meanwhile, Gary compares fire to "a sexy woman." He's obviously straight.
Episode 7: MODOK's ex-wife begins dating superhero Wonder Man. Gary appears, doing more standard henchman things.
Episode 8: Young MODOK comes from the past, kidnaps MODOK's family, and replaces them with robots. Gary does not appear.
Episode 9: MODOK is forced to work as a mail carrier at his old company. Gary believes that Austin has destroyed his spirit of super-villainy, and tries to kill him. He is so obsessed with MODOK that he blows off his bison-hunting date with his never-before-mentioned husband, Big Mike. They argue and break up.
Later they reconcile, and Big Mike brings in bison-burgers, which everyone likes. "You'd better be good enough for Gary!" MODOK warns.
Episode 10: MODOK's son's bar mitzvah. No Gary.
So Gary is identified as straight several times, the outed in one episode, then dropped. Almost as bad as Loki saying he likes men and women, but dating only women.
The show is actually very funny, if you don't mind Adult Swim-style gore. I'll give it an A for beefcake, B for the humor, and C- for the gay representation.