Hi TheBest1,
I am very familiar with the Claremont Colleges (Pomona, Claremont McKenna, Pitzer, Scripps, Harvey Mudd), but only have a few friends of friends that I know who went to grad school at CGU. Claremont McKenna has a strong foundation in politics and government, so I am going to assume that the graduate institute has similar teaching philosophies if they are related. Most of them were interested in economics/politics/government.
As far as the ranking of its MPH/PhD programs, I'm not sure where CGU stands, but I know that it would be a very small program, seeing as the undergrad colleges are fairly small. I have a few friends that did their Post-Bac at Scripps College, and really thrived because of the professor to student ratio.