NMSQT Finalist Process??

I'm almost 100% sure I am a nmsqt semi finalist for my state (index score 226), and I have good sat scores and moderate extracurriculars. However, my gpa is very low, 4.3 weighted and 3.55 unweighted. I'm scared i may not qualify for nmsqt finalist. What are my chances of being rejected? Would having a good essay be able to help me?