Gap Profit Off, Sees More Store Closings  CHICAGO (Reuters) - Gap Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=GPS.N target=/stocks/quickinfo/fullquote"&gt;GPS.N&lt;/A&gt;, the largest U.S.  specialty apparel retailer, on Thursday reported a slight  decline in quarterly profit, meeting lowered forecasts, after  summer clearance sales drew surprisingly small crowds.