You can fail. You can't even enlist with a score of 11 without a waiver, and that would be a sight to behold for a score that low.
Strangely enough, the minimum score is significantly higher for GED holders[0]. The minimum Army score goes from 31 to 50.
0: https://uniontestprep.com/asvab/blog/minimum-asvab-afqt-scor...