3️⃣ Steps To Building a Custom GPT and Better Landing Pages

You know that moment when you think you’ve nailed a landing page… only to check the numbers and realize it’s flopping harder than a fish out of water?

Yeah, we’ve all been there.

The truth is, thinking through a landing page is HARD.

Even the best marketers can spend hours (or days) obsessing over headlines, CTAs, and layouts—only to end up with a page that doesn’t convert.

But what if there was a way to iterate faster and smarter?

Enter: Custom GPTs for CRO (conversion rate optimization).

Growthub has been using a custom GPT trained on their brands to optimize landing pages super efficiently—and have seen impressive results.

For one client, their subscription-focused landing page saw a 172% increase in new subscribers in just one quarter.

Instead of spending weeks agonizing over tweaks, we had a winning version in days.

And the thing is: you can do it too.

Here’s how you can build a custom GPT to optimize your landing page:

Step 1: Train Your GPT on Your Brand

Before you start, make sure your Custom GPT knows:

Your brand’s tone of voice and messaging guidelines.
Product details and key selling points.
Customer testimonials and reviews.
Your best-performing pages and past tests.

Step 2: Audit Your Landing Page with GPT

Start a conversation with your Custom GPT and ask questions like:

“How can I improve my subscription sign-ups?”

Take a screenshot of each section of your existing page and upload it.

Let the GPT analyze & suggest improvements.

No page? No problem. If you don’t have a landing page yet, find a competitor’s page you admire, screenshot it, and ask your GPT:

“How can I make a better version of this for my brand?”

Step 3: Test & Iterate—Fast

Take GPT’s suggestions and tweak your page in your page builder.

Screenshot the updated section and ask GPT for feedback again.

Repeat for each section until the page feels dialed in.

This method removes the guesswork and speeds up the process—helping you land on a high-converting page faster than ever.

This approach saves time, removes friction, and makes CRO a lot less painful.

Plus, you’ll get more iterations done—faster.

Because at the end of the day, the quicker you test, the faster you find a winner.

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