Professor X wants to know the GPA of Student Y and says he is entitled to it because he is a school official and needs it to complete his official academic responsibilities. Do you give it to him without further question?
Correct. If Professor X is the student's advisor or the chair of the department in which the student is majoring, he can have this information (but he probably already has access to it himself.) However, all faculty members still have to have a legitimate educational need to know a student's information. For example, if Professor X wants to know the student's GPA because he is trying to decide on how he should grade the student, this is not a legitimate educational need to know.