Hi Mark
The link that Ming posted pretty much explains all the gear requirements for Southern Oman.
I was there back in March and my GT kit consisted of:
Ripple Fisher Longcast 82 - dual purpose rod
Ripple Fisher Powerfight 711 - popping rod
FCL Labo MH81 Extreme - stickbait rod
Reels were stellas - x2 18000, x1 14000 with SOM 16000 spool
Braid - Tasline PE10
Leader - YGK 200lbs
Hooks - 7/0 GT recorder, 7/0 BKK GT Rex, 9/0 Shout Kudako
Split rings - Carpenter 350lbs
Swivels - NT 2/0
Also don’t forget to bring a PE3 casting and a jigging outfit for when you’re tired of casting for GT or you’re restricted to inshore due to weather. Lastly a few miscellaneous things you’ll need are casting gloves, split ring pliers, knot tensioners and a good fighting belt.
I also wouldn’t make the mistake of taking only one GT outfit. My powerfight blew up on day 2 of the trip while punching out a cast so bring a backup.
Get ready to hide the credit card statements from the missus as you’re about to go down a very expensive rabbit hole