There are a whole range of gambling company details online. Different countries have different setups on what they will allow and not allow in regard to casino, gambling, sports betting & horse racing. Gambling & betting are considered very different entities in the eyes of the world in regard to regulation of a gambling company or betting company.
Casino is generally subject to heavily regulation and not allowed at all in some countries. Gambling may be allowed in authorised establishments but not online in others. Betting tends to be more lightly treated but again online betting is not allowed in some countries - an example is the USA - online is tricky for many gambing companies here and its best to check what is allowed online and what is not.
Generally a gambling company will need a license to operate and have their office registered as a designated address as per the country's rules.