Gruppi di Azione Patriottica

The Patriotic Action Groups (Italian: Gruppi di Azione Patriottica; GAP), formed by the general command of the Garibaldi Brigades at the end of October 1943, were small groups of partisans that were born on the initiative of the Italian Communist Party to operate mainly in the city, based on the experience of the French Resistance. The militants of the GAP were called Gappisti.

Source: Wikipedia — Gruppi di Azione Patriottica (CC BY-SA 4.0)