How to help someone with a gambling problem?
You obviously want to provide support and help him overcome his addiction, so I’ve found some resources to help. The first link below is a questionnaire of 20 questions used to assess gambling addiction. The second one is a list of some common questions about this problem and provides answers to help you understand his what he is going through and his struggles with gambling addiction. (I think it will be very helpful for you to be able to empathize with his problem) The third link is a list of locations and phone numbers for counseling services, hotlines, and many other helpful local resources in Australia.