They do not care about the tool you used to create the content, it's all about how good it is. So if you're using ChatGPT the right way, as a starting point, and then layering in your own expertise and experience, you can absolutely use that without getting penalized by Google.

In the March 2024 core update page from Google, they say: Scaled content abuse is when many pages are generated for the primary purpose of manipulating Search rankings and not helping users.

Google allows AI content because “AI can assist with and generate useful content in exciting new ways.” Automation, for example, has powered helpful content like weather forecasts, sports scores, transcripts, and finance reports for years.

E-A-T is the shorthand Google uses in its Search Quality Evaluator Guidelines and it stands for 'Expertise, Authority and Trust'. For those who don't know, the guidelines are what the people who manually review pages for Google use.