I don't know why you would say that your grad GPA "should" be pretty high...
Unless you say that because you assume graduate studies in a science/pre-med field
If your graduate work is in a non-related field then....
At least in other academic circles, I would say that a lower graduate GPA than undergraduate is somewhat expected, since graduate coursework is much more challenging.
In my opinion, it doesn't really matter how they "look" at them, since they can see it ALL in the AACOMAS file that is released to the schools: science GPA, non-science GPA, cumulative GPA, undergraduate GPA, graduate GPA, post-baccalaurate GPA, and even by undergraduate year (sci/non-sci)...
It's all there! Nothing to hide! They will see it all!
Good luck to you!