Guillermo Arriaga Jordán is a Mexican novelist, screenwriter, director and producer. Self-defined as "a hunter who works as a writer," he is best known for his Academy Award for Best Original Screenplay and BAFTA Award for Best Original Screenplay nominations for Babel and his screenplay for The Three Burials of Melquiades Estrada, which received the 2005 Cannes Best Screenplay Award.

Guillermo Blest Gana was a Chilean writer, usually considered one of his country's leading exponents of Romantic literature.

Guillermo Cabrera Infante was a Cuban novelist, essayist, translator, screenwriter, and critic; in the 1950s he used the pseudonym G. Caín, and used Guillermo Cain for the screenplay of the cult classic film Vanishing Point (1971).

Guillermo del Toro Gómez is a Mexican filmmaker and author. A recipient of three Academy Awards, three BAFTA Awards, and an Emmy Award, his work has been characterized by a strong connection to fairy tales and horror, with an effort to infuse visual or poetic beauty in the grotesque. He has had a lifelong fascination with monsters, which he considers symbols of great power. He is also known for his use of insectile and religious imagery, his themes of Catholicism, anti-fascism, and celebrating imperfection, underworld motifs, practical special effects, dominant amber lighting, and his frequent collaborations with actors Ron Perlman and Doug Jones.

Guillermo Humberto Sheridan Prieto is a Mexican literary critic, scholar and public commentator.

Guinan Khairy was a Bashkir poet, writer and playwright.

Giraut or Guiraut de Calanso or Calanson was a Gascon troubadour in the Occitan language. Of his lyric works that remain five are cansos, two descorts, a congé, a planh, and a vers. He also wrote a mock ensenhamen entitled Fadet juglar.

Guittone d'Arezzo was a Tuscan poet and the founder of the Tuscan School. He was an acclaimed secular love poet before his conversion in the 1260s, when he became a religious poet joining the Order of the Blessed Virgin Mary. In 1256, he was exiled from Arezzo due to his Guelf sympathies.

Gulchihra Sulaymonova (Tajik: Гулчеҳра Сулаймонӣ; 1 January 1928 – 5 April 2003) was a Tajikistani poet.

Gulnazar Keldi was a Tajikistani poet from Dardar and editor of the publication Adabiyet va sanat. Keldi wrote the lyrics of "Surudi Milli", the national anthem of Tajikistan.