GO. It's a Federal Government department that is jointly run by the Minister of Foreign Affairs, the Minister of International Development, and the Minister of International Trade. Putting out travel advisories is part of their mandate.

Most Canadian GO follow a [Purpose] Canada naming scheme. If you want a SIN (equivalent to an SSN) you got to Services Canada. You get your weather warnings from Enviroment Canada. Drugs are related by Health Canada. Natural Resources Canada does the obvious. Parks Canada does National Parks. Transport Canada does highways and waterways.