It is not easy or possible to take the GED classes in less than 2 weeks. This is because the course is broad and 2 weeks may be little time to study for the exams. The minimum time it may take you to complete this program would be at least 3 months. Some students can take the program for years. It depends on how strong a student you are and how much you already know.
I'm not sure what state you live in but in some states all you have to do is take the test. my friend went in when he was in 10th grade and passed he. he was done with highschool at that point and went on to work.