The Average High School GPA Is Almost 3.0 Which Is Equal To "B" In Letter. Which Is Most Acceptable By Almost All Schools But In Some Schools Acceptable GPA Range From 2.70 To 3.5 Is Good Enough To Get In. So If You Work Hard More To Get Even Above That Average Which Will Be Extra Plus Point For You To Get Admission In Your Desire College And Get Your College Degree In USA Or Canada.