* Gold hovers within sight of record highs * ETFs see biggest inflow in three months * Chinese GDP supports silver, PGMs By Amanda Cooper LONDON, July 13 (Reuters) - Gold rose for an eighth day on Wednesday, set for its longest stretch of gains in nearly five years and trading less than half a percent off record highs after European leaders mulled the option of a Greek default and Ireland's credit rating was cut to junk. European Union leaders will hold an emergency meeting on Friday after finance ministers acknowledged for the first time that some form of Greek default may be needed to cut Athens' debts and stop contagion spreading to Italy and Spain. The euro held around four-month lows against the dollar, although risk-averse investors took a breather in their recent battering of the stocks and bonds from more indebted euro zone nations such as Italy, Portugal and Spain. Surprisingly strong Chinese growth data supported industrial commodities and broader equity markets, keeping the dollar under pressure and giving gold, which usually moves inversely to the U.S. currency, an additional boost. Spot gold was up 0.4 percent on the day at $1,570.66 an ounce by 0850 GMT, having risen in the last seven sessions and set for an eighth day of gains and a gain of 5.9 percent, something it has not achieved since mid-October 2006, when it rose for nine days in a row. COMEX August gold futures were last up 0.6 percent at $1,571.70 an ounce. "It's a pretty well-trodden safe-haven story. While the issue has been bubbling away, it hadn't been acute enough to drive people into the strongest safe-haven. That situation has clearly changed in the last couple of days," said RBS analyst Daniel Major. "In the last few days, risk-aversion has been strong enough to offset the strength in the dollar, but it will really depend on how the macro events pan out as to whether gold can be carried higher or not," he said. ETF HOLDINGS RISE Reflecting the heightened investor demand for metal, global holdings of gold in exchange-traded products witnessed their largest daily inflow since early April, driven by a hefty rise in holdings of metal in the SPDR Gold Trust , the world's largest gold-backed ETF. For the first time since early May, total gold holdings are showing a net inflow so far this year following a 20-tonne inflow into SPDR and a 0.1-tonne rise in ETF Securities' London-listed gold funds. Adding to the worries about the reach of the euro zone debt crisis, Moody's cut Ireland's sovereign rating to junk status and warned of the likelihood of Dublin needing a second bailout following last November's 85-billion euro lifeline from international lenders, a week after cutting Portugal to junk and issuing a similar caution. "With European sovereign debt fears intensifying again, little clarity on what Eurozone officials intend to do next and cross-asset market confidence taking a bashing, gold has been a beneficiary, much like the Swiss franc. And in this nervous environment, we prefer assets that have limited downside exposure - i.e. gold over other precious metals and commodities," said UBS strategist Edel Tully. Also on Wednesday, U.S. Federal Reserve Chairman Ben Bernanke delivers his semi-annual testimony on economic and monetary policy to Congress and will likely be asked why the central bank's $600-billion quantitative easing programme was not more effective at bringing down unemployment and boosting growth. The Fed's QE programme was one of the key drivers for the gold price over the last year as it kept U.S. interest rates and the dollar low, giving bullion, which bears no yield of its own, more of an edge in the competition for investor cash. Bernanke may also have to spend much of his appearance on Capitol Hill convincing Congress to raise the country's debt ceiling. Helping the more industrial commodities, such as copper, crude oil, silver and the platinum group metals was Wednesday's data on Chinese growth, which showed the economy expanded at a faster clip than expected in the second quarter. Second-quarter gross domestic product rose 9.5 percent from a year earlier, exceeding economists' forecasts for 9.4 percent growth, helped by solid domestic consumption and investment, soothing some concern about potential softness in the world's top commodity consumer. Spot silver was last up 1.3 percent on the day at $36.50 an ounce, bringing the gold/silver ratio -- the number of ounces of silver needed to buy one ounce of gold -- to 43.06 from 43.46 on Tuesday. Palladium , which depends largely on the Chinese car market as a source of demand for the metal in gasoline-powered vehicles, rose 1.2 percent to $771.22 an ounce. Platinum echoed the strength in other industrial precious metals and rose 0.9 percent to $1,743.99. (Reporting by Amanda Cooper)

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