There's no single, universal standard for high honor roll. The GPA (Grade Point Average) required varies significantly from school to school and sometimes even within a single school district, depending on the grade level. It's typically a GPA above a certain threshold, often in the range of
3.75 to 4.0 (out of 4.0 scale) or its equivalent (e.g., 93-100% depending on the school's grading system).
To find the exact requirements, you should check your school's or district's grading policy or student handbook.