International competitive bids are invited for the design fabrication, delivery, inland transportation, unloading, civil works, erection, site tests commissioning, and insurance for the 220/66/11 kV gas-insulated switchgear (GIS) Gamasa substation (Package A) funded by European Development Partners, which includes the European Investment Bank, European Commission, Agence Française de Développement (AFD) and KfW Development Bank.