@noonawoon Yea my past really caught up with me lol. It's ok, i'm banking on my high LSAT score anyway. Going to be a major splitter type situation for me.
Don't give up. Try to get really strong LORs, consider writing an explanation for the GPA, and/or maybe catch some ThinkingLSAT episodes that discuss "splitter" applications.
My guess is being South American will be a boost, but it won't be as large as if you ticked off Mexican or Puerto Rican. Don't overthink it. Mark the box that you fall under.
For firm hiring you should also tick off the diversity box.