NEW YORK (MarketWatch) -- Gold futures ended lower Friday, but posted a weekly gain of 9%, as the Bush administration moved to jump-start a rescue package for U.S. automakers. Gold for February delivery ended down $6.10 at $820.50 an ounce on the New York Mercantile Exchange. However, gold futures posted a weekly gain of $68.30, or 9%, from last Friday's closing level of $752.20 an ounce.