was born in 1950 in buenos aires, argentina.
his mother was a haute-couture fashion designer and as a child, he spent hours under the drawing table reading fashion magazines. in his twenties, under the dictatorship of general alejandro agustín lanusse, on a national festive occasion, he stepped out on his balcony in underwear and protested. he got arrested. during the six months he spent in a maximum security prison, gatti started drawing. he moved to new york where he worked in the field of photography and fashion and relocated to madrid in the beginning of the 1980's. at this time, spain was experiencing the counter-cultural movida madrileña movement. 
gatti collaborated with the frontrunners of the movement, particularily in the culture and fashion scene. 
after five years with CBS record label designing covers for well known musicians, gatti opened his own studio in 1985. his collaboration with film director pedro almodovar started in 1988, and since then he has been behind the graphic content of almodovar's films. during the years of 1989 and 1990, gatti was the art director of vogue italia. 
in 2002, he was chosen to be the photographer for the pirelli calendar, confirming his success in the field of photography.gatti lives and works in madrid.