The Secretary General of the Gulf Cooperation Council (GCC) Abdulrahman bin Hamad Al-Attiyah received here today a message from Kazakhstan's President Nursultan Nazarbayev and Turkey's President Abdullah Gul, inviting him to participate in the Third Summit of the Conference on Interaction and Confidence Building Measures in Asia to be held in Istanbul during the period from 7 to 9 June. The Secretary General received the message through diplomatic channels.