text: Gilead Sciences Profit Rises 55 Pct  LOS ANGELES (Reuters) - Gilead Sciences Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=GILD.O target=/stocks/quickinfo/fullquote"&gt;GILD.O&lt;/A&gt; on  Thursday said its quarterly net profit rose 55 percent on  increased sales of its HIV drugs.