I think it’s possible to be a gay Christian. It’s possible to murder and be a Christian. Or commit adultery as a Christian. Just because you do wrong things doesn’t mean you’re not a Christian. In the end, you just have to accept the grace of God.
I believe the opinion is implicit. That is, this person believes it is fully OK and possible to BE a gay Christian. I have talked with many Christians who believe it is impossible to be both; this post is disagreeing with that notion.