They will see your transcripts and will know exactly where you went to school, and what your grades were. Many will consider a degree from an excellent school with a lower GPA as better than a high GPA from a lesser school. In general, I feel that it is better to go to the best school that you can, but one at which you feel comfortable and can perform well.
Also, just wondering... Why are you posting these questions in the "Central and South American Medical Schools" section?
"To array a man's will against his sickness is the supreme art of medicine."
- Henry Ward Beecher