He studied painting under Michele Busuttil, and was later sent to the Accademia di San Luca in Rome on the recommendation of Grand Master Emmanuel de Rohan-Polduc.
Gauci remained active until his eyesight began to decline, and he died in London on 3 November 1854, at the age of 80.
He was buried in the Gauci family grave on the western side of Highgate Cemetery.
[2] His firm completed works that included Nathaniel Wallich’s Plantae Asiaticae Rariores and James Bateman’s Orchidaceae of Mexico and Guatemala (1837–43), boasting the largest lithographic plates ever produced.
Wilfrid Blunt had nothing but praise for Gauci, calling him “a master of the process, he ranged his tone from the palest of silvery greys to the richest velvet black; his outline is never mechanical or obtrusive.”[5] He also produced the lithography for John Forbes Royle, Illustrations of the botany and other branches of the natural history of the Himalayan Mountains, and of the flora of Cashmere.