Hi nmohan007,
Welcome to the forum.
The new members meeting are on Monday at 21:00 (UK) and Thursday at 19:00 (UK). To join, you just need to go to the Support Groups page, https://www.gamblingtherapy.org/online-support-groups-for-problem-gamblers-their-friends-and-family/ . Click on a meeting while it is running and select it to join.
For GA Zoom meetings – You can find a list of upcoming meeting here – https://gamblersinrecovery.com/?s=