My understanding of the Gospel message is that Jesus saves. None of us brings our righteousness to God. He brings His righteousness to us. Therefore, we are holy by imputation of His Life in us. Actually, the Law makes us aware of our sin.
Sin is much more of a noun than a verb.
Sin is not so much what we do, as what we are. That may be why the Apostle Paul called himself the foremost of sinners. If a gay person, or anyone else for that matter, who has been credibly presented with the Gospel message isn't a Christian, he or she is judged by God according to His standards of holiness and righteousness. However, if he or she appropriates God's grace through implacable trust in Him to deliver, keep, heal, and protect him or her in all of life-circumstances and throughout eternity, he or she remains under the covering of His shed Blood. The metaphor or type of this deliverance apart from works that I like to use is when the children of Israel were told to put the blood of a lamb upon their lintels and door posts.