How is this AI landing page was built + hooked into GHL?

Came across this landing page from Scaling With Systems (Ravi Abuvala) and loved the execution.. super smooth, fast, custom-feeling. Way beyond what I can build natively in GHL's page builder without burning hours.

https://www.scalingwsystems.com/dfyf-free-training-vsl-1

Thinking of vibe-coding a similar page (custom form, no-submit-button instant capture, buttery interactions) and then hooking it into GHL as CRM.. cos I can see submitting the form clearly triggers GHL text automations on the backend.

Anyone know how something like this is typically built and connected to GHL? Curious about:

Hosting it outside GHL and webhooking leads in, vs iframing into a GHL funnel

How the form triggers GHL's native automations (texts, etc.) reliably

Any pitfalls with tracking/pixels breaking across that setup 🤔

Would love to hear from anyone who know how this was done!