Board Exams are the final year national exams where the government decides your final grades.
Internal is where the School decides your final grades based on how you performed throughout the school year.
The percentages are the average of all the grades we received in each course.
This website says that I got a 3.33 GPA in 9th and 12th, and a 4.0 GPA in 10th and 11th, I don’t know how accurate it is though.