Question: What is the average GPA of students taking ACCT-211?
SQL: SELECT avg(T2.stu_gpa) FROM enroll AS T1 JOIN student AS T2 ON T1.stu_num  =  T2.stu_num JOIN CLASS AS T3 ON T1.class_code  =  T3.class_code WHERE T3.crs_code  =  'ACCT-211'