GASC said it wanted at least 30,000 tonnes of soyoil and 10,000 tonnes of sunflower oil. The deadline for the offers is May 11.
The buyer said that traders should submit bids for payment with 180-day letters of credit and at sight and that it would choose between both offers.
GASC will also hold a domestic tender for vegetable oils on Tuesday, the supply ministry said, where it is seeking quantities of at least 3,000 tonnes of soyoil and 1,000 tonnes of sunflower oil.
The arrival period for the local vegetable oils would be July 16-August 5.
(Reporting by Nadine Awadalla; editing by Jason Neely)