What are Gulf Countries and why are they called gulf countries?

Answer: The countries adjacent to the Persian Gulf are called Gulf countries. Bahrain, Kuwait, Iraq, Oman, Qatar, Saudi Arabia and the United Arab Emirates are the names of the seven Gulf countries. In addition, all of these countries, except Iraq, are members of the Gulf Cooperation Council (GCC). 

 Saudi Arabia, Kuwait, United Arab Emirates, Qatar, Bahrain and Oman form the GCC, a political and economic union of six Middle Eastern countries.  GCC was founded in May 1981 in Riad, Saudi Arabia.