M561 Gama Goat / M792 ambulance (multiple) I photographed these Gama Goat examples — an M561, 6×6 tactical 1-1/4-ton amphibious truck and the M-792 ambulance version. M792 Gama Goat ambulance Fort Lewis 2015 M561 Gama Goat Royal City (approx.) 1998 M792 Gama Goat ambulance Royal City (approx.) 1998