Your extracurriculars are amazing but these colleges, as far as I know are GPA orientated, to get in you need a banging essay.
My friend who’s applied to GATech has a GPA of about 3.9 and an ACT of 30 and ranked 1st in his class (he’s pretty scared about it).
My advice to you is to stay focused on your academics for now. Low test scores are a big hit in the dark so work your ass off now. Best of luck, mate.