Gioachino Antonio Rossini was an Italian composer who gained fame for his 39 operas, although he also wrote many songs, some chamber music and piano pieces, and some sacred music. He set new standards for both comic and serious opera before retiring from large-scale composition while still in his thirties, at the height of his popularity.

Gioconda Belli is a Nicaraguan-born novelist and poet known for her contributions to Nicaraguan literature.

Giordano Bruno was an Italian philosopher, poet, cosmological theorist, and Hermetic occultist. He is known for his cosmological theories, which conceptually extended to include the then novel Copernican model. He proposed that the stars were distant suns surrounded by their own planets (exoplanets), and he raised the possibility that these planets might foster life of their own, a cosmological position known as cosmic pluralism. He also insisted that the universe is infinite and could have no center.

Giordano Bruno Guerri is an Italian historian, writer, and journalist. He is an important scholar of twentieth-century Italy, in particular of the Fascist period and the relationship between Italians and the Catholic Church.

Giorgi Avalishvili was a Georgian diplomat, writer and one of the founding fathers of the Georgian theatre. His sister Mariam was married to the Georgian diplomat Garsevan Chavchavadze.

Giorgi Eristavi was a Georgian playwright, poet, journalist, and the founder of modern Georgian theatre.

Giorgi Kazbegi was a Georgian nobleman and general in the Imperial Russian service. His military and civil career spanned more than four decades, ending with the Bolshevik takeover of Georgia in 1921. He is also an author of military and historical reports, including an account of his 1874 reconnaissance mission to the then-Ottoman held Georgian lands with sketches of the region's medieval Christian monuments.

Giorgi Kekelidze is a Georgian poet, essayist and the founder of the first Georgian digital library, lib.ge.

Giorgi Leonidze was a Georgian poet, prose writer, and literary scholar.

Giorgi Aleksandresdze Melikishvili was a Georgian historian known for his fundamental works in the history of Georgia, Caucasia and the Middle East. He earned international recognition for his research on Urartu.