API Call to a specific customer-made GPT

Hi,
I built some GPTs, and gave them a bunch of information, including some files upload (for example, with content for FAQ in a website).
Now, I want to do an API call to that specific GPT (for whatever reason - I want my employees to go to our website for the responses, and not go to the GPT store, so I can monitor usage).
Is there a way to do an API call to a specific GPT? have its model / ID and add it as an input in the API call?
FYI - I am not a developer and do not have coding experience (I am working off no-code / low-code bases, specifically here, using Webflow and Wized for the API calls).
Thanks in advance!
Dori

I want to do a similar thing to OP, but I want to bring int 3 pre-configured/trained GPTs into an agency framework such as CrewAI for example to work within a sequence. I don’t know if I would be able to get the same results if i retrain them from scratch within another framework…
Are we saying this is not possible?