The term 'Country on the Gulf of Guinea' refers to two countries in West Africa, Nigeria and Gabon. Nigeria is a 7-letter country located on the Gulf of Guinea, and is the most populous country in Africa. It is bordered by Benin, Niger, Chad, Cameroon, and the Atlantic Ocean. Gabon is a 5-letter country located on the Gulf of Guinea, and is known for its vast rainforests and diverse wildlife. It is bordered by Equatorial Guinea, Cameroon, and the Republic of the Congo.