EMERGING MARKETS-Colombian peso leads Latam FX gains on dovish Fed

(Recasts with Colombian peso gains, updates prices) BRASILIA, April 28 (Reuters) - Colombia's peso surged to nearly a six-month high on Thursday as Latin American currencies gained after weak U.S. GDP numbers added to expectations that the Federal Reserve will not quickly raise interest rates. The Colombian peso was the best performer, up 2 percent, helped by an increase in the price of oil, a major export for the country. The Brazilian real and Mexican peso also gained, with t