GSIM is Jama'at Nusrat al-Islam wal-Muslimin (French: Groupe de soutien à l'islam et aux musulmans), a Salafi Jihadist organisation in the Maghreb and West Africa.
GSIM may also refer to:
GSİM (Youth and Sport Directorate of Erzurum Province), owners of: Palandöken Ice Skating Hall, formerly GSIM Yenişehir Ice Hockey Hall, in Erzurum, Turkey Erzurum GSIM Ice Arena, in Erzurum, Turkey Graduate School of International Management (GSIM), of the International University of Japan