Columbia University Columbia College

Hello all, I am a current student studying at De Anza College in CA
Well, I am an international student from Korea, and I am 21 yrs old in US(we have different calculation method in counting ages)
I tried to apply to both Columbia University-Columbia college, and Columbia University General studies(GS). But when I called one of the officers of Columbia GS. She said I cannot apply to both schools at the same time. So, I am going to apply to only Columbia University-columbia college.
Somehow, I remember that I saw most students in columbia college are under 21 yrs old. And I am curious whether I can still apply to Columbia college even though I am 21 years old right now.(borned in 1994.april.15th)
Please answer my question by tonight! Cuz The deadline of the application is dur by March 1st

Thanks!

Columbia University GS is for students with more than a year of gap between their high school education and college education.

However seeing that you attend a college in CA you should be fine to apply to Columbia College even if you are 21 years old.