I am absolutely against gambling as it is an awful thing in any way and is a business that is mostly being run by shady people and organizations yet it should be legalized and strictly controlled by the authorities.
Some parts of the gambling business are already legal in Turkey anyways- lotteries, sports betting, horse races etc so why not just chose a few exclusive spots in Turkey where operating casinos would be legal and start making money for the treasury.
For example one such spot in the Eastern Black Sea region where not only Turkish gamblers that go to Georgia now would spend their money AT HOME but also much of the Arab tourists visiting the region will do it too.
A spot or two on the Mediterranean coast, on the Aegean, around the Marmara and Thrace etc. You won’t save the economy with that but you can create an industry that makes billions and attracts even more tourists and foreign spenders.