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.

By extension, the less numerous partisan socialist and shareholder city units were also called GAP.

One of the successful operations of the GAP was the Via Rasella attack in March 1944.

Led by Bruno Fanciullacci, members of the GAP also assassinated Italian fascist philosopher Giovanni Gentile in April 1944.