Air France-KLM, GOL-Varig sign cooperation and code-sharing agreement
Air France KLM and GOL Linhas Aéreas Inteligentes S.A., which comprises the GOL and VARIG brands, have signed a commercial cooperation agree...

https://basevida.blogspot.com/2009/04/air-france-klm-gol-varig-sign.html

The agreement has provisioned for code-sharing. By mid 2009, Air France will be adding its code to GOL flights between Sao Paulo and Rio de Janeiro and thirteen major Brazilian cities: Belem, Brasilia, Belo Horizonte, Campinas, Curitiba, Florianopolis, Fortaleza, Iguassu Falls, Manaus, Porto Alegre, Recife, Salvador and Vitoria. More cities could be added later. A similar agreement is being prepared between KLM and GOL.