Despite most governments do not recognize Bitcoin as a currency, all those restrictions and existing laws relating to online and mobile gambling apply to bitcoin gambling. If online gambling with fiat money is illegal in your jurisdiction, then it is also illegal with BTC.
when "gambling" is illegal in a country then "gambling" in all its forms becomes illegal and it doesn't matter what you use for payment. that is why bitcoin gambling falls under the same category and i believe they are illegalizing bitcoin gambling more because they can't tax bitcoin.