When you dream gang means: In a dream, you might see yourself as a member of a gang. This symbolises your need to become more powerful and dangerous in order to achieve what you desire. A gang could be an opposition force in your life. Are you interested in being part of a gang? Do you require protection from a gang? Gangs can be a sign that you are afraid to follow the rules. The idea of gangs that have guns suggests anger directed or repressed aggression and two opposite factors in your daily life.
(in Dream Dictionary)