By Gram Slattery ABU DHABI, June 22 (Reuters) - U.S. Secretary of State Marco Rubio will travel Tuesday through Thursday to the United Arab Emirates, Kuwait and Bahrain, on a trip that will give the Trump administration a chance to sell its preliminary Iran accord directly to Gulf Arab allies. While in Bahrain, Rubio will also meet with the Gulf Cooperation Council, or GCC, a grouping of six Sunni monarchies that also includes Saudi Arabia, Qatar and Oman, State Department spokesperson Tommy Pigott said on Monday.