Casual clothing giant Gap Inc on Thursday posted a one per cent rise in October same-store sales and announced an eight per cent climb in total third quarter sales to $3.9 billion from $3.6bn in the year-ago period. The California-based operator of more than 4,200 stores said total sales across its banners for the four weeks ended November 1 climbed four per cent to $1.24bn from $1.19bn last year.