gay person; homosexual man
Loanword from English 'gay'. Primarily refers to male homosexuals. Can be used as a self-identifier or a neutral descriptor, but context and tone matter.
He came out as gay.
ゲイの友達とよく映画を見に行く。
I often go to the movies with my gay friend.
異性愛者 means a heterosexual person, the opposite orientation from ゲイ.
ゲイ refers to a homosexual man, while レズビアン refers specifically to a homosexual woman.
Loanword from English 'gay'.