After the addition of guitarist Disashi Lumumba-Kasongo and bassist Eric Roberts in 2003, the group was signed to Fueled by Ramen and Decaydance Records, on which they released their debut album, The Papercut Chronicles.

The group gained a strong fan base while promoting the album, appearing at festivals such as The Bamboozle and Warped Tour.

Since that release, the band's single "Cupid's Chokehold" reached number four on the Billboard Hot 100, and "Clothes Off!!"

On September 9, 2008, Gym Class Heroes released their third album, The Quilt, which contained numerous collaborations with other artists.

Lumumba-Kasongo has been working on his side-project Soul, while McGinley now drums in the rock group Kill the Frontman.