The monument was designed by Henry Augustus Lukeman and consists of an equestrian statue depicting David McMurtrie Gregg, a military officer who had served in the Union Army during the American Civil War.

He attended and graduated from the United States Military Academy and served as an officer in the Union Army during the American Civil War.

Gregg is depicted in his military attire, with a saber in his right hand and the horse's reins in his left.An inscription on the rear of the sculpture's base reads "AUGUSTUS LUKEMAN 1922".

An inscription on the rear of the pedestal reads, "GETTYSBURG / 1863 Erected by / The Commonwealth of Pennsylvania", while a bronze plaque affixed to a side of the pedestal reads, "State Commission / Ira Stratton, Chmn / Daniel K. Hoch, Sec / Wellington M. Bertolet / Isaac Hiester / Richmond L. Jones / Eli M. Rapp / William M. Fleckman".

Another plaque located about 15 feet (4.6 m) in front of the monument says, "MAJOR GENERAL DAVID MCMURTRIE GREGG / COMMANDER UNION CAVALRY, WHOSE / ACHIEVEMENTS CONTRIBUTED SO LARGELY TO SUCCESS AND ULTIMATE / VICTORY AT GETTYSBURG JULY 1863 / TURNING THE TIDE OF THE WAR.