Around half of the kids tested out a math class in high school regret at the end. They can surely pass the exam of the higher level Math but not necessarily getting an A. So it may hurt the GPA. Some of my D’s friend reached AP Calc BC in junior but could not get a 5 in the AP exam and need to take Calc2 in college freshmen. My D took AP Calc BC in senior without skipping any Math but had the Algebra I (pre-algebra) in 8th grade like half of the class. She scored 5 and received credit for Calc1 and Calc2 in college.