Study to Test the Benefit and Safety of GM-CT-01 in Combination With 5-FU to Treat Bile Duct and Gall Bladder Cancer

GM-CT-01 at 280 mg/m2 given IV for 4 consecutive days in 28 days cycle until disease progression

5-FU given IV by infusion for 30, at 600 mg/m2 in combination with GM-CT-01 for 4 consecutive days in 28 days cycle until disease progression