Gonzalo Matías Longo Elía (born 14 March 1974 in Buenos Aires) is a retired Argentine rugby union footballer.
He then would play for ASM Clermont Auvergne, from 2004/05 to 2006/07, where he won the European Challenge Cup in 2007.
He returned to San Isidro Club, where he was player-coach for the final season of his playing career in 2007/08.
In 2002 Longo won the Olimpia de Plata for rugby union.
This biographical article relating to Argentine rugby union is a stub.