As a former Army brat, I can see very easily how this can happen. I would not take a gap year. Apply to a community college or state directional (most would still be taking applications, well into July) that has a strong articulation agreement with a University that has an excellent business school in the Yellow Ribbon program. Maintain your good grades and take the math you’re missing as well as try to knock out your foreign language requirements and other gen ed requirements common to all schools (like freshman writing). This might take a little investigating, but concentrate on Texas and Illinois and whichever state your parents will go to next if they are moving soon.