I know this thread is kind of old but I have a couple of things to say here. I got my GED because I dropped out of school during my last year. My mother passed away, I was going through too much, and the brat kids I went to school with decided to torment me worse after I lost my mom. They actually started making fun of me because of losing my mom, I couldn't stand the school, I couldn't stand all of the snobby kids, so I said screw it and dropped out. Honestly, to me the GED was so much easier than I expected. It was so much faster too lol. I do suggest that if you aren't good at math, to definitely study. The rest of the tests seemed like 5th grade level, or middle school level to me. I was shocked by how easy it was.
One more thing to add is what branch of the Military allows you to get a GED through joining? I thought all branches required at least a GED from the start, and some require a diploma, not a GED. It also depends on the need in the Military for the job you want in the Military for how lenient they will be on allowing a GED only or a diploma.