Casual apparel giant Gap Inc on Thursday showed more signs of its recovery as it posted a 10 per cent jump in May same-store sales on the back of strong women's sales and more focused marketing. The California-based operator of more than 4,200 stores said in a statement total sales at its banners in the four weeks to May 31 climbed 14 per cent to $1.1bn from $995 million in the year-ago period.