Anyone know the best way to check if an RTG casino site is legit in Australia?

I've been doing some research on online casinos lately, and I keep running into sites mentioning 'RTG' which I assume stands for something related to gaming. However, since the Australian regulatory environment is pretty strict, I'm really worried about falling for a scam or a site that isn't properly licensed. Has anyone here used or researched any specific RTG casinos in Australia recently? I'd really appreciate any advice on how to verify their licensing status or if they have a good reputation among local players. Any warnings about specific sites would be extremely helpful.