If, by "Church," you mean the Christian church, then (and this covers all denominations) the core beliefs are found in the four Gospels, and are enunciated by a fellow named Jesus.

Granted, a lot of presumably Christian churches don't pay much attention to what Jesus said. In fact, many of them say and do a lot of things that Jesus would—and did—disapprove of.

And I don't recall that Jesus said one single word about homosexuality, or anything that could be construed to be about homosexuality.

Don Firth