PRNewswire -- GOL Linhas Aereas Inteligentes S.A., Brazil's low-cost airline, has signed a commercial agreement with Unidas Rent a Car, one of Brazil's leading car rental companies, to launch a "Fly & Drive" program. This air and ground service package offers a 50 percent discount on Unidas' daily car-rental charge when customers purchase their GOL tickets through the Company's website in Brazil and abroad.