I feel bad when I read gambling stories that led to suicide. No mayyer how addicted someone is, please don't hide it from anyone. It's better for people to talk to you and help you with words of advice and encouragement because they go a long way. However, some gamblers prefer to keep their addition as a secret, and it's only when they're ready to let go that you can help them.
Indeed is very sad to see that one would just take because of gambling and commit suicide. of course that is the problem most gamblers are having in gambling, how can someone eventually hide his gambling addiction while he or she knows that it can lead to depression. Because just like as you mentioned once a gambler that is addicted to gambling open up to you that he is addicted, you most definitely look for a way out for him to be free from it.
There have been depressions on every sides and all of us may have one or two thing to caused s into having depression because of the curdles of life, but we never chose to give up because we know what we have and whom we are, if you really have a determination on what you want, then you will understand how to handles every life situations the proper way instead of considering suicide as an alternative to escape the shame.