<p>I’m unclear of your educational background. You say you were not homeschooled and you say that you don’t have any documentation for any other school. That tells me that your only choice is the GED. With the GED and SAT that you mention, you should be fine for a local, state school - community college or maybe one of the colleges if they aren’t overly competitive. Some of your admission ability may have to do with how well you present yourself and what you have actually been doing all this time.
As far as Ivy league, unless you have some sort of “pull” (with a politician or other heavy weight), I’d assume that your chances are very slim. Your best bet might be to contact a local college and ask them what you need to do or show them to get admitted. Good luck.</p>