There are places in Southern Oman where, at certain times of the year, GTs come into the reefs closer to the mainland.
However, as you say, local fisherman pretty much decimate them once they arrive. Most of the time by netting since the fish congregate in small areas.
In Musandam, Northern Oman, GTs are caught in close. The local fisherman tend to leave them alone though (although not always) because they tend to use hand lines and set lines for more desirable eating fish like dorado, tuna and spanish mackerel.
Regards,
Trev