Born in Fossola, a frazione of Carrara, Giorgelli was the daughter of a businessman in the marble industry and a housewife.

[1] Due to her mother's economic difficulties, at ten years of age, young old Gabriella was entrusted to the college of the Sisters of Capulet, in Carrara.

[1] Giorgelli made her film debut in 1960, in a very minor role in Luigi Comencini's Everybody Go Home.

[1][2] After appearing in several art films, in the late 1960s Giorgelli landed some leading roles in B-movies, mainly consisting of spaghetti Westerns and commedia sexy all'italiana films spoofing Pier Paolo Pasolini's The Decameron, which she alternated with supporting roles in more prestigious and high-profile productions.

[2] Giorgelli also appeared in many photo comics including Sadistik and is interviewed in the documentary film The Diabolikal Super-Kriminal.