The following table summarizes recent med school admission rates by MCAT score and GPA:
https://www.aamc.org/download/321508/data/factstablea23.pdf
The outcomes seem very highly correlated with MCAT and GPA. For example, students scoring between a 30-32 on the old test, this corresponds to a 79-88th percentile. With this MCAT score, someone with a GPA between 3.2 - 3.4 had an acceptance rate of 46.6%, whereas someone with a GPA between 3.6 - 3.8 had an acceptance rate of 73.9%.