I attended a Mass with the gay Catholic friends I went to the parade with, probably at Most Holy Redeemer. I’m sure that it was connected with the group Dignity. And that was the first Catholic Mass that I had ever been to. That was in 1982. But, as Wikipedia says:
On October 1, 1986, the Congregation for the Doctrine of the Faith, the Catholic body charged to “spread sound Catholic doctrine and defend those points of Christian tradition which seem in danger because of new and unacceptable doctrines”,[3] issued a letter entitled On the Pastoral Care of Homosexual Persons. In it, the Catholic Church affirmed its position that homosexuality was an “objective disorder” and that all support should be withdrawn from any organization that undermined the Church’s teaching or were ambiguous about or neglectful of it.
An immediate effect of the document was the decision by several American bishops to order that DignityUSA no longer be allowed to hold Mass in Catholic churches. Dioceses in Atlanta, Minneapolis, Buffalo, Brooklyn, Pensacola, Vancouver, Washington, D.C. and New York City all rescinded permission for the organization to hold services on church property. In some cases the group chapters had been holding Masses for a decade or longer.
DignityUSA - Wikipedia