I don't think a low GPA should discourage you from pursuing a medical degree. If it is truly what you want to do, then you should try. Try improving your GPA, or improving other parts of your application/resume. For example, get internship experience at hospitals or research institutions.
My sister had low GPA in undergrad. However, she worked in a hospital while completing post-bacc education and masters to improve her grades, and is now in medical school.