Your application will have very detailed instructions when it comes to classifying classes as science/non-science. There are a million different gpas that ppl throw around, including science gpa, which will include most science related classes along with math (and stats I believe).
There is also a BCP (bio chem physics) gpa which is simply more limiting to such classes. It won't include the math, or other broad sciences.
Once you type in your coursework and transcript grades and fully submit your app (and not before then) it will spit out the calculated gpas.