Gulf cooperation council was originally formed by

Gulf cooperation council was created on May 25, 1981, the 630-million-acre (2,500,000 km²) Council comprises the Persian Gulf states of Bahrain, Kuwait, Oman, Qatar, Saudi Arabia and the United Arab Emirates.
The unified economic agreement between the countries of the Gulf Cooperation Council was signed on November 11, 1981 in Abu Dhabi. These countries are often referred to as The GCC States.