Founded in 1967, the Central Athletic League aims to foster good sportsmanship for the Delaware Valley's most talented men and women student-athletes.

From 1993 to 2006, Garnet Valley was known as the fastest growing school district in the state of Pennsylvania.

In September 1999, a classroom wing across the back of the building, the "Reader's Park" courtyard, and the Garnet Valley Education Center, where the district's offices are located, were also opened.

In September 2006, the high school completed phase 2 which included the renovation of the Science, Health, and Business Technology wings along with the construction of the new general education wing's second floor, completed in February 2006, and the Morris (Moe) DeFrank Football Stadium.

In August 2017, The new gymnasium's flooring was replaced, the cafeteria's serving areas were upgraded, and the library was renovated in order to be able to accommodate modern technology in the future.

In November 2018, the Moe DeFrank stadium was upgraded and repaired due to significant wear and tear over the past several years.

[1] Pennington School is currently leased by the district to the Delaware County Intermediate Unit for the education of special-needs children.

[3] The district is run by a nine-member school board of directors who are elected to four-year terms each.

To this end, Garnet Valley School District has begun work on tailoring classes to "keep kids engaged," among other changes.