Do gay people go to heaven?
Do people who disrespect their parents go to heaven?
Homosexuality is only one symptom of sin. Lying, cheating, murder, arrogance, and a million others are just as bad. If anyone who sinned was banned from heaven, it would be empty.
The truth, though, is that heaven should not be a big concern for us here on earth. Only God knows who will be with Him for eternity. Certainly, we all want to be there. But there is no checklist for entry.
God is just like you in that He wants to spend time with the people who love Him. He knows that we are all sinful, and He wants to help us be as much like Jesus as possible. But our focus should be on drawing close to Him and becoming like Him. The more you know of God, the more you will want to obey Him. And you know what? You won't even think about whether you're going to heaven or not! You'll be content in His presence.
If you live your life in close communication with God, loving Him as best you can and trying to be like Jesus, then you'll be there when the roll is called up yonder.
But, you know what? Heaven isn't even the end! Revelations tells us that there will be a New Earth. That's right. We're not going to be sitting on clouds forever. We'll be on a remade, perfect earth! And you won't care who used to be gay or who used to be a murderer. All you'll care about is loving God.