UPDATE 1-Brazil's GPA taps Argentina boss, ex-Wal Mart head to run supermarkets
January 20, 2016 at 16:45 PM EST
SAO PAULO, Jan 20 (Reuters) - Brazil's largest diversified retailer GPA SA tapped a senior executive in Argentina and the former head of Wal Mart Stores Inc's Brazil business to run its struggling supermarket and convenience store unit, according to a securities filing on Wednesday.