Los Angeles-based Gorilla Nation, which provides online advertising sales for website publishers, said today that it has expanded in Canada, and has opened up a new office in Montreal. According to Gorilla Nation, it has appointed Jean-Sebastien Tremblay as its Director of Sales for Eastern Canada along with the new office opening. The company now has offices in New York, Chicago, San Francisco, Scottsdale, Toronto, Montreal, London, Sydney and Melbourne.