Yes, Gregory Corso and Jack Kerouac were friends. They met in 1950 and remained friends until Kerouac's death in 1969. They were both part of the Beat Generation movement and shared a love of writing, drinking, and women. Corso was inspired by Kerouac's writing and Kerouac was impressed by Corso's poetry.
Musing with the Maverick: Discovering Gregory Corso’s Remarkable Literary Journey