[chjj]

Again, Gramsci and later followers of Gramsci advocated infiltrating cultural institutions and establishing a counter-hegemony to subvert the existing cultural hegemony. That should be enough to satisfy anyone's definition of cultural marxism. Read Gramsci or any other cultural marxist if you want proof.

edit: I'll also point out that Mao's cultural revolution in China was the first implementation of Gramsci's vision of cultural marxism. There's no way to know whether Mao had ever read Gramsci, but it's not out of the realm of possibility.