What is called "the garden tomb" is located outside the city walls of Jerusalem and close to the Damascus Gate. In 1842 Otto Thenius proposed that a location known as the "place of the skull" was the Calvary (Golgotha) where the crucifixion of Jesus occurred. In 1867 the garden tomb was discovered near this believed location of Jesus' death. The connection of the place of the skull with the garden tomb believed to be where Jesus was buried was given prominence by British general Charles Gordon in 1883. This is why the garden tomb is also referred to as "Gordon's Tomb." Sources Used: Albert Barnes' Notes on the Bible; Wikipedia, The Resurrection Tomb by E. Raymond Capt. | 
