We live outside the Western world but with kids who attend an international school staffed by internationals.
What do you hope to achieve with testing? Identification of learning disorders perhaps masked by the gifted presentation?
Is the child in a class with children his age or has he been accelerated?
I strongly suspect that a formal evaluation isn't necessary to achieve your goals. If the child is acting inappropriately for his age, knowing he has a high IQ isn't going to help you. He may have learning or developmental disorders such as autism that make it difficult for him to control his actions or express his needs and wants effectively. Can he get medical testing in your location for developmental disorders or is that also unavailable?
Can you make your best guess as to his needs/limitations/gifts and develop a plan for the parents and teachers to guide them in implementing a behavioral system that allows the child to still have access to higher level learning material?
FWIW, in our location, people needing non-medical testing for educational purposes fly to their home countries. One child gets a type of occupational therapy via Skype. Another child flew to a major medical hub monthly for occupational therapy. These are rich children of Westerners. The local children with special needs generally muddle through with minimal support or to into full-time special education.
