General Growth Properties to Buy Rouse  NEW YORK (Reuters) - General Growth Properties Inc.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=GGP.N target=/stocks/quickinfo/fullquote"&gt;GGP.N&lt;/A&gt;, the No. 2 U.S. shopping mall owner, on Friday said it  would buy Rouse Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=RSE.N target=/stocks/quickinfo/fullquote"&gt;RSE.N&lt;/A&gt; for \$7.2 billion, expanding its  holdings of regional shopping centers and commercial property.