Love, Sidney (1982-83) was a small but first step on a long road to gay male (and LBTQI) fronted series in later decades, even though the actor himself was cishet.
Without the firing of the starter's pistol, you never reach the finishing line.
The series My Two Dads was groundbreaking for having a girl being raised by two men without a woman.
Even if the two men characters weren't gay, it was still valuable to show the general public that two cishet men raising a cishet girl such as the character of Nicole wouldn't automatically be predatory towards her.
My Three Sons, two decades before, was also a good step towards showing the public that a mom wasn't actually inherently required. Unfortunately, in the last few seasons it became a kind of dime store version of "The Brady Bunch" when Dodie played by Dawn Lyn joined and etc.