How do I get my GED so that I can join the Marines?

As of right now I'm being home schooled by an SOS program. I'm getting sick and tired of using this stupid program that only tries to give you Information through the eyes of a Christian. I want to join the Marines when I turn 18, but this program is going to take longer and I'm failing everything because I just am not trying. I'm 16 years old but I was expelled from the Wake County School System over something stupid. I was actually doing straight A work, but then I got in trouble. How do I get my GED at the age of 16 in the Raleigh area of North Carolina. Also, does the Marine Corps accept GED applicants. I want to be apart of an M1 Abrams crew.