Guarulhos is a Brazilian municipality. It is the second most populous city in the Brazilian state of São Paulo, the 13th most populous city in Brazil, and is also the most populous city in the country that is not a state capital. In the last few years it has outgrown Campinas. It is part of the Metropolitan Region of São Paulo. The population is 1,324,781 (2015 est.) in an area of 318.68 km². It is the most populous non-capital city in the country and has the second-largest GDP in the state, the 8th largest in the country.OverviewThe name comes from the Tupi language, and means "Eaters", "big-bellied people"; a reference to the original indigenous inhabitants of the area.It ranks 8th by GDP among Brazilian cities; 2nd in São Paulo state. (source:IBGE, Brazil's national institute of statistics. GDP by cities report, published in 2005 with data from 2002). It is the 10th largest suburb in the world. The per capita income for the municipality is R$12,793. São Paulo-Guarulhos International Airport (GRU), one of the main Brazilian airports, is located there. The city is the seat of the Roman Catholic Diocese of Guarulhos.The municipality contains part of the Cantareira State Park, created in 1962, which protects a large part of the metropolitan São Paulo water supply. It also contains part of the Mananciais do Rio Paraíba do Sul Environmental Protection Area, created in 1982 to protect the sources of the Paraíba do Sul river.