I don't know. Inborn homosexual inclination of itself does not make a person a sinner. Sin is not inherited. But whether it is an inborn or developed feeling is not the problem any more than whether a person's inclination toward drug dependency is inherent or acquired. Temptation is not sin.
Homosexual attraction is no more sinful than is heterosexual attraction.
It is the same-sex fulfillment for the homosexual and the fulfillment out of wedlock for the heterosexual that is contrary to the purpose of God. Celibacy may not be the course of first choice but countless men and women have lived fulfilling, holy lives in that state. And homosexual persons, along with some cases of heterosexual persons, can only fulfill the approving will of God in the celibate state. I trust that I have dealt with this sensitive issue with compassion for, and without disparagement of, any of God's children.