As a matter of interest, GV, has your GF got debt?
Taking her away from her gambling routine will certainly serve to break her habit. I believe it is necessary to break the habit as well as overcoming the compulsion.
Yes, it is amazing how “kids” thrive through adversity. I’m glad they love their mother still . I’m sure their dad had an input in their success too.
If I can stop gambling there is no reason to believe your GF can’t do likewise.
Please do all you can to avoid enabling her.
The best way to do that is to safeguard your own possessions and not become addicted to her charms.
