You may have to go for regular test and I hope other than gulf countries driving licenses are being converted in to Omani driving licenses. I got UAE driving license against my Omani driving license in 2005.
INTERNATIONAL DRIVER'S LICENSE IS NOT CONVERTIBLE TO OMANI DRIVER'S LICENSE.YOU CAN USE THE LICENSE ONLY IF YOU ARE A TOURIST FOR A MAX.OF 3 MOS.
ONCE YOU ARE A RESIDENT OF OMAN,THEN YOU HAVE TO TAKE DRIVING LESSONS PASS THE DRIVING EXAM.THOUGH THERE IS A SHORTCUT IF YOU HAVE A LICENSE IN YOUR HOME COUNTRY JUST HAVE IT ATTESTED FROM YOUR EMBASSY TO PROVE THAT YOUR LICENSE IS NOT FAKE.SECONDLY,YOU HAVE TO PAY 5 RIALS FOR STAMP IN MINISTRY OF FOREIGN AFFAIRS (MUSCAT),LASTLY GO TO ROYAL OMAN POLICE GET A TRAINING LICENSE BOOKLET FOR 5 RIALS AND GET A ROAD TEST.
Few friends says we can use Indian International Driving Licence which is valid for 1 yrs issued from India... Using that we can drive car in Oman for an year !! I may be wrong... Has any expat tried this way and succeeded or failed ????