In a nutshell...the median overall GPA for all matriculants in recent years has been at or slightly above 3.6 (and it appears to be on the increase)...for schools in the top rankings of USNEWs (say top 30 or so), the median is typically always higher than this - the highest I have seen is around 3.85 at Washington University...schools "lower ranked" than the top 30 or so have medians typically clustered in the 3.5 to 3.6 range, but usually no lower than 3.4...there will always be exceptions for some state schools, etc...anecdotal evidence is that BCPM should fall in fairly close lockstep with overall GPA (i.e., there should not be a big downside discrepancy like, say, overall 3.5, BCPM 3.0)...
If you have an overall GPA of 3.6 or better, with a closely aligned BCPM, you are in pretty good shape. As you go south of that line, the odds start going the other way...a sub 3.0 GPA is deadly - per the MSAR, something like only 2 percent of applicants with a sub 3.0 are accepted at any allo schools...I assume a higher acceptance rate at DO, but do not know that number for sure...
And as another poster said, get the MSAR...best $ you will ever spend for med school info...