I know of one guy getting a gig on a B-732 with 250 hrs TT and another one with similar time getting a job on a HS-125 here in UAE.
That's been a few years ago, but dont think anything has changed so far.
But to my knowledge you can only get a validation through an operator, a private person cant get a validation on a CPL or ATPL. What's new: Validation are only issued by GCAA after obtaining your residence visa.
So I believe it does'nt depend on GCAA, it depends on your employer, how many hours you will need.