For unweighted GPA, no matter what type of classes you take: A = 4.0; B = 3.0; C = 2.0 ...
For wieghted GPA:
Regular class: A = 4.0; B = 3.0; C = 2.0 ...
Honor class: A = 4.5; B = WGPA3.5; C = 2.5 ...
AP & Post AP class: A = 5.0; B = 4.0; C = 3.0 ...
Every school's GPA calculation is different, you need to contact HS for the specific info. Hope it helps.