Gap Inc says it plans to more than triple sales in China in three years as it seeks to grab a bigger bite of the overall $US1.4 trillion ($A1.50 trillion) global clothing market. The San Francisco-based clothing chain, which operates stores under the Gap, Old Navy, Banana Republic, and Athleta brands, generated $US300 million in sales in China in the latest fiscal year ended February 1. It says China will be its biggest growth initiative. The company unveiled its first Old Navy store in t