ChatGPT only jumbles words together in a way that is statistically likely to resemble a coherent sentence based on the bits and pieces it’s been fed, without checking whether or not they’re factual. asking them anything doesn’t prove or disprove anything. it says it’s got an account because someone on the internet mentioned once that they’ve made an account to check it out and that they’re excited to see where it’s going.
it also sort-of-kind-of-little-bit-of works with Misskey/Calckey. I don’t think any official work has been done to enable support, but you can login with your account and browse posts.