His style remains firmly within the tradition established by Giotto and Taddeo Gaddi. Gerini favoured heavy, sculptural figures and a clear sense of spatial volume. In works like An Episode from the Life of Saint Giovanni Gualberto or his various depictions of the Madonna and Child, he used gold backgrounds and tempera to create a sense of permanence. His compositions are orderly and balanced. He avoided the decorative excesses of the later International Gothic style. Instead, he focused on the physical presence of his subjects through thick outlines and solid blocks of colour.

Modern collectors value Gerini for his connection to the foundational era of Florentine art. His paintings provide a direct link to the formal clarity of the Trecento. The technical quality of his work is often studied through modern methods. X-radiographs of his works, such as the Annunciation, reveal the careful preparation and underdrawing required for medieval altarpieces. These prints bring a sense of historical weight and architectural structure to a room. They document the transition from medieval devotional practice to the early Renaissance.