Man, what a flight connection! Grim. The only VIP Smiles Club we've used was at GIG, and it was in the international departures area. It was for international passengers on a number of airlines, including US and UA (business and first class, and those with certain membership cards, etc.). If we'd arrive at GIG on an international fight and departed on a domestic one, we couldn't have accessed the lounge. The only clubs we've used at GRU were UA and AA airline clubs, for departing international passengers. When you exit Customs, and leave the security area, there will be a transit desk for TAM and Gol, at least, in front of you (I don't know if it's open 24 hrs.). If it's not open you go to the airline check-in desks on the 2nd floor. Ask about the VIP lounge. The gate areas are pretty sparse in terms of comfort and options to eat or drink (I don't know if anything is open all night; some places outside security should be).