There are two coops yellow cabs authorized to pick up passengers from GIG one of them is: http://www.coopaerotaxi.com.br/pas.html The only authorized yellow cabs are Aerotaxi and Aerocoop. Don't take a yellow taxi without one of those two names on the real fenders. All normal Rio de Janeiro yellow taxis look like this: The name of the Coop will be on the rear fenders of the car. Some yellow cabs do not belong to coops but all the ones at GIG do. To take these taxis you need to run the gauntlet of the booths, pass teh dozens of taxi touts, and head to the line of yellow taxis. They normally do not speak any foreign languages, but they do know how to get to all major hotels. Inside the terminals are a host of booths, as you leave baggage claim, where young ladies eagerly attempt to convince you to take the more expensive prepaid "special" taxis. These you can pay with credit cards and you know the price. they have different colors. The white ones are Transcoopass: http://www.radio-taxi.com.br/ The blue ones are Cootrama: http://www.cootramo.com.br/ And there is Coopertramo too: http://www.coopertramo.com.br/ The advantage of these is predictability and ease, but they are 80% more than the price of yellow taxis, and usually the cars are about the same.