Gambling in a dream stands for a risk you are weighing in waking life — a choice where you stake something real on an uncertain outcome. Folk tradition also sees in it the pull between thrill and control.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.