In 2013, Gettysburg Area High School reported an enrollment of 1,034 pupils, with 34% coming from low income homes. According to the National Center for Education Statistics, in 2010, the school reported an enrollment of 1,151 pupils in grades 9th through 12th, with 369 pupils eligible for a federal free or reduced-price lunch due to the family meeting the federal poverty level. The school employed 82.5 teachers, yielding a student–teacher ratio of 13:1. According to a report by the Pennsylvania Department of Education, 100% of its teachers were rated "Highly Qualified" under No Child Left Behind.