Why couldn't you anyways?
I was an F average student throughout school, dropped out and took the GED as soon as I was eligible, scored in the top 1%, then applied to college when I was 16.
Every school I applied to never asked for my high-school transcript, only my GED score, and several private schools offered me full or partial scholarships based on my GED score...because as far as records are concerned, HS didn't happen, and if you got the equivalent of an "A" on the GED, you're a 4.0 student as far as grants, scholarships, etc, are concerned.
I got my (first) undergraduate degree for free because of that. Being a HS drop-out was the smartest thing I ever did.
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