ChatGPT is a human assisted AI that can be used to generate reasonable looking answers to questions. It seems to have been used for at least one answer here (now deleted). However StackOverflow has (temporarily) banned it for answers there.
One major criticism of it is that it generates text that can be factually "questionable" since it depends on the data that was used to train it, which isn't always reliable.
Should we take a position and make policy on using it?
The possibilities are to forbid it, permit it with citation, or to permit it generally. There might be others as well.
One problem I see is that it might be difficult to "notice" its use. It might, therefore, be hard or impossible to enforce any policy.
Another problem is that humans also (present company excluded) sometimes generate faulty reasoning and unfactual "facts".
Personally, I think its use could greatly degrade the usefulness and validity of this site if it is overused. But, then, I'm generally skeptical of AI in its present form. We are, after all, trying to provide valid career guidance to our peers.
Insights into how a restrictive policy might be enforced would be welcome in answers if you believe they are appropriate. Here is some discussion about how to recognize these).
The New York Times has an article (probably paywalled) concerning ChatGPT.