Self Reporting Grades on Cal State Apply

When you self report your high school grades on your Cal State application, do you report A minuses or B pluses, or do those strictly count as As and Bs?

Cal State Apply accepts +/- grades when you self-report but your CSU GPA will be calculated based on A,B,C only and not use the +/-.

So do they make admissions decisions based on self reported high school grades
(with +/- grades) or based on the CSU GPA?

They make decisions based on your self-reported grades and courses which need to match your HS transcript along with your CSU GPA and test scores.