The Chat GPT bot comes in two variants - GPTBot and ChatGPT. You can block the two using a robots.txt directive. There are no guarantees that any of them have not captured all your content for AI training before copyright lawsuits mandated this directive. But add the following to your robots.txt file
User-agent: GPTBot
Disallow: /
User-agent: ChatGPT-User
Disallow: /
Technical