In 2003, Gilinski acquired and subsequently merged Banco Sudameris and Banco Tequendema. This merger created GNB Sudameris, a bank with assets of over US $6 billion that ranks among the top 10 largest banks in Colombia. The purchase of Servibanca, an ATM network with over 2,000 machines, and Suma Valores, a stock exchange commission agent company, has further expanded the network.