John Lithgow isn’t gay.
I believe he lived and studied in London for several years - perhaps that's where the "vibe" comes from. ;-)
Lithgow’s second marriage, to UCLA history professor Mary Yeager in 1981, is still going and they have a son, Nathan, and a daughter, Phoebe.
His only outside of marriage romp was with Liv Ullmann, during his first marriage and ending the union in 1980, which was, obviously straight.
Whereas I don’t appreciate his misguided and uneducated outlook on his politics, he is a fine actor and very versatile with it.
rwood