Gianmarco D'Agostino was born in Arezzo in 1977 and graduated in Cinema History and Critical Analysis at the University of Florence.

After several years as editor and assistant director for cinema and tv productions, in 2002 he started writing, directing and producing short films, documentaries and promotional campaigns, commissioned by public institutions and bank foundations.

For the Fondazione CR Firenze he curated seven exhibitions, covering the provinces of Florence and Arezzo with interviews, documentaries, aerial cinematography and short movies, including La Fuga (The Escape), written with the novelist Marco Vichi.

For the Banca di Credito Cooperativo di Cambiano he directed four art documentaries hosted by Antonio Paolucci, former director of the Vatican Museums, among which is Il Tempo di Michelangelo (Michelangelo’s Times) about the Sistine Chapel in the Vatican and the Medici family chapels in the Church of San Lorenzo, Florence.

Very interested in social issues, he has worked on projects about several topics: safety at work, with the social campaign Per me la Sicurezza è… (For Me Safety is…) produced by INAIL; dyslexia, with the documentary Come una macchia di cioccolato (Like the Stain of Chocolate), produced by AID; detention, with the documentary Oggi voglio parlare (Today I want to Talk), produced by Regione Toscana.

In 2015 he founded his production company Advaita Film Srl, and produced a multimedia package displayed at the Opera di Santa Maria del Fiore Museum, Florence, curated by Mons. Timothy Verdon, among which is La Volta del Cielo (The Vault of Heaven), a documentary about Brunelleschi and the Cupola of Santa Maria del Fiore Cathedral.

In 2016 Gianmarco produced and directed his first independent film, the documentary Camminando sull'acqua (Walking on Water), about the tragic events of November 4, 1966, when a flood devastated Florence, with outstanding and unreleased color footage.
The film has been selected to more than 45 international film festivals, winning several awards, including Best Director, Best Documentary and Audience Choice Award.
The film has been broadcasted by Italian network Mediaset and the Swiss RSI.

In 2018 Advaita Film Srl produced the documentary Tutto il Mondo, Piano Piano (The Whole World, One Step at a Time) and the advertising Portiamo la Scuola dove non c'è! (Bringing Schools to Where There Are None!) for the Italian NGOs Il Filodijuta and Pang'ono Pang'ono, that are bringing schools, health care and clean water to the south of Bangladesh.
The one minute advertisement has been awarded in several film festivals worldwide, winning the prestigious “Best Social Film” at the United Nations in Geneva.

For the Uffizi Galleries, Gianmarco created, produced and directed two multi-vision installations for two exhibitions curated by the archeologists Lorenza Camin and Fabrizio Paolucci.
A Cavallo del Tempo (Riding through the Time), for the exhibition set up at the Boboli Garden in Florence (26 June - 14 October 2018), is a 300 square meters large projection about the art of horse riding, from antiquity to the Middle Ages.
This video art has been awarded as “Most Original Film” and “Best Global Film” at the Equus International Film Festival in Montana, USA, which is the most important festival about film and horses in the world.
Ai Piedi degli Dei (Worn by the Gods), for the exhibition set up at Palazzo Pitti in Florence (17 December 2019 - 20 September 2020), is an immersive projection about the art of shoemaking in the ancient world, the epic movie and contemporary fashion.

In 2020 Gianmarco consolidated his relationship of trust with the most important museum institutions in Florence.
For the Archdiocese of Florence, together with Opera di Santa Maria del Fiore, he produced and directed the documentary Rinascenza come Resurrectio: il Santo Sepolcro di Leon Battista Alberti nella Firenze del Quattrocento (Renaissance as Resurrection: Leon Battista Alberti’s Holy Sepulcher in Fifteenth-Century Florence), written and narrated by Mons. Timothy Verdon.

For the Bargello Museums he wrote (with the novelist and screenwriter Matteo Bortolotti), produced and directed the short movie Il Bambino che sarà Cavaliere (The Boy who would become a Knight), featuring animations by Dario Imbrogno, on permanent display at the Museum of Palazzo Davanzati.

Currently Gianmarco is producing the documentary Florence, the Consul and Me, that will tell the story of the director's quest on the trails of Gerhard Wolf, the German consul in Florence during WWII who risked his life to save Florence from Nazi fury.