How hard is it to keep a good GPA as a BME pre med?

<p>I plan on going to GT for pre med since BME will give me a nice fallback if med school doesn't work out. Still, med school is my goal, and I want to make sure that I can get in. Math and science are my strengths and I haven't gotten a B in math or science in high school while taking gifted and AP courses. How hard in general would it be for someone who is good at math and science to keep at least a 3.5 in BME assuming that that would be a minimum GPA to get into med school, and what does one need to do to make sure that he can get into med school while at GT?</p>