GSI Italia actively supported the creation of a network made up of local authorities and municipalities, which is called Città Solidale, for which it performs the secretary and coordinating tasks. Città Solidale consists of 18 Umbrian local authorities which share a common commitment, that is to focus on solidarity while performing the administrative and political tasks. The following municipalities are active members of the above federation: Spoleto, Foligno, Cascia, Norcia, Sellano, Giano, Vallo di Nera, Castel Ritaldi, Montefalco, Gualdo Cattaneo, Preci, Scheggino, Campello, Trevi, and local authorities such as the Local Health Authority no. 3, the Csa, the Asem, and the Consortium of municipalities in the Martani and Serano mountain areas. Città Solidale can benefit from both EU funds and the regional ones so that it can fulfil its active solidarity commitment. In all these years, GSI Italia promoted several activities which contributed to establish a consolidated network of collaborations.
Among the milestones of its commitment, it should be noted the Regional Law no. 26/99 by the Region of Umbria on decentralised cooperation and its contribution to the establishment of the EUROPEAN CIVIC FORUM, a network of associations working in the solidarity and cooperation fields, which covers 23 member states and whose headquarter is located in Brussels. GSI serves as the Italian representative in the Board of Directors of the above entity.
GSI commitment and collaboration with other actors working in the solidarity field allowed for establishing different associations which play a prominent role in the territories where they are settled. Among these, there are GSI MARCHE, EL HOMBRE SOBRE LA TIERRA in Mexico, FAA I TUORA in Burkina Faso, and BOMOYI in the Democratic Republic of Congo.