What college courses do I need to become a psychiatrist?

A psychiatrist is a physician (MD), you will need to get into medical school (pre-med in college). With a GED, you had better have a very high GPA in college. Entrance to medical school is highly competitive.

A psychologist needs a PhD, and to get into a good program, you will also need to be an exceptional student. Although there are PhD programs of lesser quality, but you will still have to pass state license exams to practice.