gpa has 1 distinct synonym spread across 1 of its 1 sense. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
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
Synonyms, antonyms and the broader and narrower relations for gpa come from Princeton University’s WordNet. Full sources and licences.