It really depends on ur lifestyle to which country u should move to.... or what environment suits u. Theres a lot of information about GCC countries online. 

You can submit ur all documents to Hamad Medical Corporation in Qatar, they will access and will let you know. 

For private practicing, you can search for vacancies online. Now a days the demand for experienced Dentists is increasing in Qatar. 

For best results visit first personally and try to meet poeple around the city. 

GoodLuck !!