What is the highest GPA for a high school in history?

There's no official record or tracking of the highest ever GPA achieved across all high schools in history. Several factors make this impossible to determine:

* No central reporting agency: High school GPAs are reported locally and aren't compiled nationally or internationally in a way that would allow for comparison across all schools and time periods.

* Varying grading scales: Different schools use different grading scales (e.g., weighted vs. unweighted, different point values for A, B, C, etc.), making direct comparisons impossible.

* Data privacy: Student GPA information is generally considered private and not publicly shared.

While individual schools might have students with exceptionally high GPAs, there's no way to definitively say which school or student has ever held the "highest" GPA.