Gang management has been a long-standing issue for Correctional Service of Canada, as it is for other correctional services around the world. Keeping incompatibles apart, sometimes having to have units that are specifically designed for people who are involved in gang activity, having different management strategies in terms of when those people get yard access, get access to vocational training, get involved in programming, etc., are all part of the day-to-day work and operations of corrections.
On May 31st, 2016. See this statement in context.