Getting a GED and going to Uni

So this is my situation, i’m currently a Junior in high school with average/ below-average grades. I’m thinking about getting my GED the summer before senior year and getting a jump start on community college. After completing my first 2 years there (assuming I perform well) would I be able to get into a University like ASU or UofA if I do good on my SAT/ ACT. I just don’t see a purpose in staying in HS for my senior year if I would be able to start communit college a year early and save a year of my life. Thank you!!

What is going to magically change that will cause you to suddenly earn the above-average grades in your community college courses, that will be required to successfully transfer to ASU or UofA? If you can’t answer that question, then perhaps it would be a better choice to work on your study skills and habits during your Senior year.