grade point average

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The average grade earned by a student, figured by dividing the grade points earned by the number of credits attempted.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A method of computing a numerical value for letter grades received in school by assigning each a numeric value and averaging the numbers.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a measure of a student's academic achievement at a college or university; calculated by dividing the total number of grade points received by the total number attempted