Depends on the map honestly. With enough cover you can run and gun as long as you stay close to said cover and it could still count as guerilla warfare. Guerilla warfare is simply stealthy blitzkrieg tactics designed to either disorient the enemy or just plain wipe them out. The biggest criteria for it is the attacking group size, which ranges from solo to up to around seven personnel per guerilla unit. (The max is up to debate last I heard about it). Back during the civil war in Nicaragua between the rich and the poor, the guerilla fighters moved in groups of 3-5 from what my family told me.