Hello,
As far as I know, there is no list comparing the GPAs/GRE scores of accepted applicants at many schools, and many schools do not explicitly reveal this information on their websites.
You can find this information for some schools or departments by entering ["public health" gpa "average gre"] into your favorite search engine. You may also try contacting the schools in which you are interested; sometimes the admissions office staff can give you an idea of the stats of admitted students.
Good luck!