Gabon Business Directory: GAB is the ISO 3 alphabet country code of Gabon. Currency of Gabon is FCFA, which has a short code of XAF. Capital of Gabon is Libreville. Gabon has the population of 2067561 and approximate area is 267667.00 square kilometers (or approx. 166328.2738 square miles). Population density of Gabon is approx. 7/Km2 (or approx. 4.3498/mile2)