Hi @AnthonyMainvill, I hope you are doing well.
Not at the moment, but we do have this new chatspot alpha we released quite recently. This is not really a tool you can use with your chatbot but quite interesting.
I recommend you post this in our Ideas Forum your request of ChatGPT as a Chatbot within HubSpot. Our Product experts take notes of the needs of our customers there and the more popular a vote is, future changes are likely to be made.
Best,
Diana