GS Lines is the result of a process of acquisitions of shipowners, initiated in 1990 with the purchase of Empresa de Navegação Madeirense, Boxlines in 2010, and Portusline Containers International (PCI) in 2015. Currently, GS Lines operates 7 ships – 4 own and 3 chartered – with a total capacity of 6,778 containers, on the maritime lines between mainland Portugal, Azores and Madeira, Spain (Canary islands and Algeciras), Cape Verde (Praia, Mindelo, Sal and Boavista) and Guinea-Bissau.