It was originally founded in New York State in 1871 as a literary society and was re-established in 1987 as a multicultural fraternity.

[3] It was a successor organization to the Delphic Society at Rochester, which had been active until at least December 1866.

[4] Its founders were:[5][3] With affiliations at other schools, the college literary society at Geneseo became known as the Delphic Fraternity.

[6] Delphic eventually became a regional fraternity with chapters at Oneonta, Jamaica, Cortland, New Paltz, Plattsburgh, and Potsdam, New York, and Mansfield, Pennsylvania.

In the early 1950s, the chapter became briefly associated with Sigma Tau Gamma, a larger national fraternity.

[10] In 1962, the organization became a legal not-for-profit membership entity by incorporating in the state of New York as the Delphic Fraternity of New Paltz, Inc.[11][3] After fifteen years of dormancy, the fraternity was re-established as Delphic of Gamma Sigma Tau at SUNY New Paltz on March 11, 1987.