Thomas Gebhardt rolled up to Times Square Wednesday in an orange-and-white 1963 Cadillac Miller-Meteor Duplex sporting "Ecto-1" plates. His arm bore the familiar logo of an apparition trapped in the crosshairs of a red-slashed circle. " New Jersey Ghostbusters," his business card read. "We Believe You." Underneath, his title: "paranormal elimination, ectomobile specialist." He wasn't the…