Calculating GPA for Bright Futures

I am curious how Bright Futures GPA is calculated when the student has taken more than the required minimum in the core subjects. For instance, BF requires 4 math credits. My son has taken 4 credits in high school and he also took Honors Algebra 1 in 8th grade. Will BF use the four highest grades including Algebra 1 from 8th grade or will they only consider the 4 courses taken in high school? He also took Spanish 1 & 2 and a physical science in 8th grade. Will BF consider those courses if the grades are higher than in some of the other core courses he took in high school?

https://www.floridashines.org/CCRE/hs_accessbf.jsp