Hi Alew and welcome to the forum. Which of the thigns you have read can you apply to your own situation? Have you got yourself banned from those bookies? Have you got a blocker for your PC to stop you visiting any gambling site?
Is there anyone you can confide in who could help you with financial barriers?
I wouldn’t rule GA out, I am agnostic and it helps for me. There are agnostic versions of the steps and serenity prayer that you can easily find online. It isn’t religious. Besides if one meeting helped you stop for 2 years then that in itself might be a good reason to try again.
Anyway, keep posting here and let us know what steps you are starting to take.