San Francisco-based Gap Inc. GPS disclosed Thursday that it was laying off 1,800 employees from its headquarters and its “upper field” workforce as part of a restructuring plan that includes simplifying its operations and decreasing management layers. The apparel retailer’s stock gained 0.6% in premarket trading. The layoffs represent 1.9% of the 95,000 employees that company had as of Jan. 28. Gap said it expects to incur about $100 million to $120 million in costs as a result of the restructuring, including $75 million to $85 million in employee-related costs. The company expects the planned job cuts to completed by…








