Don't mind at all.
I completed up to 11th grade. I will give you I was an honors student. I had transferred schools and to complete my senior year, I would have had to take 3 courses, two of the bs courses I didn'tn want to take anyway. So I enrolled in college, took 12 hours, loved it and then took my GED (this was not commonplace back in the good old days).
The point of the matter is, no one will care about your high school stuff. They will look at your undergrad, and specifically your core medical school requirements.
So, if you are a GED person who wants to go to medical school, do well in college, do well on your MCAT.