 Brazilian food retailer GPA on Wednesday reported gross revenue of 21.6 billion reais 4.1 billion in the first quarter for operations including Argentina, Colombia and Uruguay, up 14 year-on-year. In Brazil only, GPA reported a 15 rise in quarterly gross revenue to 15.9 billion reais, of which 8.5 billion reais came from its fast-growing wholesale unit Assaí, the company said in a securities filing. 