If you have a WordPress based site and want to track the accesses of the ChatGPT/OpenAI bots, @Jan-Willem Bobbink has created this useful plugin: https://www.notprovided.eu/track-chatgpt/ - I'm using it now and working as expected.
top of page
SEOFOMO Chat
A constructive forum to share and discuss about the latest in SEO news, updates and resources
Get the latest in SEO every week by subscribing to SEOFOMO now
bottom of page
I will need to try it.
On the other hand, I don't know if you saw this image by Himanshu Sharma aka @analyticsnerd on X, that shows how GA4 already shows ChatGPT as referral traffic source: