If you go to the link and follow the next link to the actual bill, it says it’s for the school performance grading scale. It does not mention grading kids or a GPA at all.
Here’s another story that also says it’s for grading schools, not kids within the school. https://www.abcactionnews.com/news/national/bill-aims-to-create-15-point-grading-scale-set-f-at-39-or-lower