ahhhhhh okay okay. No as far as I know, OptomCAS calculates prereq gpa for each of your years of university, bostbacc gpa (if you have one), graduate gpa (if you have one), cumulative undergraduate gpa, and an overall gpa.
then they'll calculate biology/life science gpa, inorganic, organic chem, biochemistry, and physics gpa's, a combined gpa for those, and then a math, psychology, english, other science, and other general gpa. Then from everything I've mentioned in this paragraph they'll calculate a total gpa.
They also calculate a separate gpa for every school you've attended. I have yet to see separate calculations done by each school on OptomCAS. Someone please correct me if I'm wrong.