New military and economic committee is established by decree issued by UAE President
The move comes with Kuwait hosting a two-day summit of the GCC, which is riven by divisions after Saudi Arabia and its allies cut ties with Qatar earlier this year.
The committee "will co-ordinate between the two countries in all military, political, economic, trade and cultural fields," according to a decree issued by UAE President Sheikh Khalifa bin Zayed Al-Nahyan.
There was no immediate confirmation from Saudi authorities.
The two countries are close military allies, including in Yemen where a Saudi-led coalition is battling Iran-backed rebels.
Saudi Arabia, the UAE and Bahrain, together with Egypt, cut all ties with Qatar on June 5, accusing the gas-rich emirate of supporting Islamist extremists and of being too close to Shiite Iran, Riyadh's arch-rival. Qatar denies the allegations.
Mediation efforts led by Kuwait have failed to resolve what is the worst crisis to hit the Gulf Cooperation Council in its 36-year history, casting serious doubts over the future of the six-state alliance.