That is correct. There is no sliding scale of GPA vs. MCAT score to be sponsored. If you have previously taken any bio, chem, physics classes and earned less than a B in any of those classes, regardless of what your GPA is before entering the program, they will also require you to get a 30+ MCAT for sponsorship, even if you re-take those courses at HES.
Likewise, if you have never taken pre-req courses and your GPA is above 3.0, you need to earn no less than a B in X credits (note that if you're required to take 20 credits, you need to get at least a B in each class, which is different from maintaining a B average. 3B's and C won't cut it.) Otherwise, you will also need a 30+ MCAT for sponsorship, which is not free should you qualify.