The New Zealand competition watchdog the Commerce Commission today [Monday] gave the go-ahead to a 50%-owned unit of Fonterra Cooperative Group Ltd to buy the outstanding 50% of Grated Cheese Co. (GCC) it doesn't already own. GCC produces grated, shredded and diced cheeses under the Greenfields brand from raw material supplied by Fonterra. It exports products to Australia, Asia, Latin America and the Middle East.