Gap is searching for a replacement for Gap brand President and CEO Jeff Kirwan, who is resigning. The brand has struggled to recapture the magic of its 1990s glory days. Wardrobe basics have evolved, with customers swapping out denim for yoga pants. In recent years, the brand has lost market share to rivals such as H&M and Zara. Old Navy, the company’s budget brand and biggest division by sales, has been a bright spot.