Los Angeles-based Gorilla Nation, an online advertising representation firm focused on brands, is taking on the ethnic marketing arena with a new multi cultural marketing service, GNMulticultural. Gorilla Nation launched the new service today, saying that it will aggregate web properties servicing the African-American and Latino communities. Gorilla Nation--which sells ad space for Internet content providers--said it will provide a dedicated team of sales specialists focused on the market. Among the sites the firm will rep includes Mocha City, Bossip, and ClutchMagOnline, focused on the African-American community, and Lossip, LaMusica, and VivirLatino focused on the Latino community. Gorilla Nation is backed by private equity firm Great Hill Partners.