Florida airline Gulfstream International Group Inc ( GIA.A) filed for bankruptcy on Thursday to cope with debt and rising fuel costs, but said it would not affect its 150 daily flights. The Fort Lauderdale, Florida-based airline flies to 18 destinations in Florida and the Bahamas. From Cleveland, Ohio it flies to six cities in neighboring states. The company said the filing would not affect its 600 employees and it would honor all tickets... It said it would use the bankruptcy to clear the way for a fresh capital infusion.