Who are Gibraltar's four surviving Chief Ministers?

Short answer

The four surviving Chief Ministers of Gibraltar are: Adolfo Canepa, who served from 1987 to 1988; Sir Joe Bossano, who served as Chief Minister from 1988 to 1996; Sir Peter Caruana KC, Gibraltar's Chief Minister from 1996 to 2011; and Fabian Picardo KC, Gibraltar's current Chief Minister, who was elected in December 2011.