Homosexuality is a grave sin. However, having homosexual TENDENCIES is not a sin. It's a disorder. If the person manages not to act on them, he has done his duty to God. If he does act on them and confesses, and sincerely tries to change, he has as good a chance as any of us.
Considering how promiscuous gay people are, I'd say he has a tough fight ahead of him. But if he wins it, he wins it with honor.
I am a strict ( and straight ) guy, but it really bothers me when I hear people just condemn homosexuals in a blanket statement. I can see why, considering the "gay crusade" shoved down our throats at every second. But you only increase their defiance and make them hate Christ more when you talk like that. They just think "Oh, I'll never make it," and then their hearts go dark and they go to Vatican II seminary and you know the rest of the story...
God is merciful. He will see any sincere efforts that even a homosexual makes to follow the law. Mind you, it must be SINCERE. If he came up to me and said "I'm a gay Catholic!" as if it were a badge of honor, I'd know right away he wasn't sincere. I'd avoid him like the plague. He is taking pride in his aberration. If I knew he was gay by his mannerisms, even though he was saying "I'm not gay, I'm not gay," I'd feel sorry for him and pray for him. And if he said flat-out "I've always had an attraction to men and I have struggled against it all my life," I'd even cautiously admire him.
St. Paul spoke against "Men with men WORKING that which is filthy." He didn't say "Men thinking about that which is filthy." Sometimes those thoughts pop into our heads and we have to chase them out. It's no different with heterosexuals. One day I'll be strolling along and suddenly a perverted image will pop into my head out of nowhere. The devil is attacking me. I have to say a "Hail Mary" and think of the beatitude of the saints and the peace of heaven. Mary is the key here. Thinking of her gentleness and grace and how offensive even the slightest sins of mind are to her, even though she is always ready to forgive them, never fails to shame me into correcting myself.
And if this doesn't work, I will burn myself with a lighter. That's what I did when there was a girl at the gym flirting with me. She certainly wasn't the marrying kind and this was no spiritual attraction; she was a classic minx, gliding about batting her eyelashes. Just looking at her would flood my brain with sexual images. So I told myself, "Until you stop thinking of her, you're going to get burned and it will hurt." As I was driving home, doubled over with the pain of sexual desire, I would roast my arm with the lighter until it looked like an entree at El Pollo Loco. Eventually I got sick of being burned and stopped going to the gym when I knew she'd be there. I finally realized that I was torturing myself and to LOOK AWAY.
I don't think this is really any different with gays. If they say they have a "stronger temptation" then heterosexuals I'd say they are full of pride as well as sinful lust. I live in Los Angeles by the beach and cute girls of all kinds -- brunette, blonde, redhead, short, tall, thin, lush -- are EVERYWHERE. Sometimes I pray that God takes me out in a car accident before I slip and commit a mortal sin after baptism.