OK, so when I was in HS (1980s), the only "bump" we got was an extra 0.5 for Advanced Placement classes. I had a 4.0 from 1st grade to 12th grade, so with all my AP classes, I got up to a 4.1 HS GPA.
By the 90s, Florida HS's started giving bumps for "Advanced" classes, bigger bumps for "Gifted" classes, and a super bump for AP classes. 18 of my 24 HS credits were Advanced/Gifted/AP, so I definitely would have done better under the new method. I also had 2 credits of PE, 3 credits of regular Latin, and 1 credit of Journalism.
However, when I looked at the Florida Dept of Education, it seems like the most you can have is a 5.0 for AP, so if you have a 5.0 that would mean every class you take in HS is AP. Doesn't seem right.