You will need to meet all the requirements for the GED plus program, (currently AFQT 50+) as well as all requirements for your potential MOS before you would be able to join the GED plus porgram. The concept of "failing" one section is relative, there is no specific benchmark that is considered a failing score on any one section. Certain line scores are required for certain MOS jobs, but it is not failing, it simply means that you do not qualify for that specific job, and you may still qualify for other jobs. In the case of GED plus, getting over a 50 on the AFQT is what is most important. However, the two largest components of the AFQT are "Math" and "English," so you may want to work on that before you take the ASVAB.