I'm gay....what do I do?

The human genome contains only around 35,000 genes. That is way too small a number to possibly assign 1 gene per trait or determining a "gay" gene. Its rather the make up of your entire genome that can influence your sexual inclination. There are so many factors that are at play when it comes to this. Would it be so bad to explore the opposing side of something you have believed all your life? You don't have to believe it, just have the knowledge.

As for the Quran outlining whether homosexuality is permissible or not, its not written in black and white. The beauty of the Quran is that its interpretation lies in its reader.