The term "GAT subject" refers to a topic that is tested on the Graduate Assessment Test, such as mathematics, English, or social studies. When looking for synonyms for "GAT subject," one could use words like "major field," "core subject," or "subject area." Other terms that may be used, especially in academic settings, include "discipline," "field of study," or "academic subject." In informal contexts, a person may simply refer to their "GAT subject" as their "major" or "chosen field." Regardless of the terminology used, it is important to recognize the importance of these subjects in determining one's academic and career path.