When you are considered a career in the military you need to take the ASVAB test. But each branch of the military has different ASVAB requirements that you need to meet. They are different levels of education that you must reach to take the test. But you also need to score a certain amount of points on that ASVAB test to gain access into the branch you desire.
For the Air Force you will pretty much be looking at having at least a high school diploma. They do not accept that many people who have received a GED. But if you have scored at least a 65 on that ASVAB and have a GED you may be able to get into this branch. But with a high school diploma the minimum score you can have is 36 points.
With the Army they allow a lot more people who only have a GED. In fact they allow the most of any of the branches of service with only a GED but you still do need to take the ASVAB test too. The Army Prep School is another option to someone who does not have a GED or diploma to get into this service. Minimum requirements for the ASVAB test is a 31, but they also have allowed people into the ranks with scores that were around 26 too.
Another branch you may be considering is the Marines, where you are going to need a score of 32 on the ASVAB. But they may actually take a few people who score lower, around a 25 in some cases, but that is hard to get completed. Only allowing about 5 percent of those people who have a GED into this rank is another thing you have to get by.
In other words if you only have a GED you will need to get a 50 as a minimum on that ASVAB. It just goes to show you that having a high school diploma is almost a must to join up with the Marine Corps. This is the same requirement that is set by the Navy for those who only have a GED.
The minimum score you need on an ASVAB test for the Navy is a 35, but in a few instances they may let people in who have only gotten a 31. But they make it a bit harder on those who only have a GED, and have gotten at least a 50 on the test. Those people need to get three references from people in the community that are influential, and have not previous drug use or involvement with the police.
Your last option would be a trip to the Coast Guard, as long as you have a score of at least 40 on the ASVAB and a high school diploma you should make it. They do make a few exceptions on those scores with a waiver and depending on the job you are hoping to do.
Yes you can again possibly join the Coast Guard with only a GED, but you will need to score another 10 points minimum on that ASVAB too.