This could be generalized to other sources beyond chatgpt, for instance
"Y told me X,"
with Y being chatGPT, quora, reddit, google, online course etc.
Chatgpt is just a current instance of a language learning model or 'online oracle'. In the future we may have additional names from chatGPT rivals like Google's bard, and who knows Amazon is gonna come up with a third version as well.
A more generic name might be welcome. Potentially we can keep a tag chatGPT for the moment as an alias for the more general term.
Aside from this, it may not seem like GPT is gonna be used as an important resource for statistics advice. Tagging potential questions that have specifically chatGPT as a source might be a bit exaggerated and is giving this source of information more attention in the tags than needed. Rather than making a separate tag, to lure away users from wrongly using a tag, it might be better to discourage the use of the currently existing chatGPT tag for such problems.
The same is true for the first description of the chatgpt tag. This is more like a language learning topic. The chatGPT is just currently a hype but doesn't seem to require a special tag (except as an alias to help people find the correct language learning tag)