I think you need to narrow the scope a bit. "Gay oppression in America" is pretty broad. A history professor that I had in college used to say the broader the paper, the less insight it provides.
Some ideas off the top of my head:
1.) Suicides by gay teenagers (or older people for that matter) Why? How do we stop it? How do we react? etc.
2.) America's progress on the issue compared to other countries of the western world.
3.) Gay celebrities - and the "closeted" ones who fear the ruining of their career that may come along with coming out.
4.) The origins and evolution of homophobia. Does the bible really tell religious individuals to hate gay people? Where else does homophobia come from? How do we deal with it in modern society.
Good luck!
Scratch and claw for every day you're worth!
Make them drag you screaming from life, keep dreaming
You'll live forever here on earth.