Few things here:
- GPT-4 cannot be fine-tuned by any of us mere mortals currently. I assume you’re referring to a GPT you made in ChatGPT Plus that has custom knowledge.
- Even if it did work (which it most likely won’t without huge security risks) it would be a violation of the terms of service.
- What is possible is to integrate an assistant into your Wordpress page using the Assistants API or something similar, but this can get expensive and requires coding.
Short answer is no, your best option would be to find a trustworthy individual and hire them to do what you need (if you’re not comfortable coding that is).
Hope this helps.