Why is GA4 showing (direct) / none for my Shopify checkout sales?

When users navigate from WordPress to a separate Shopify domain checkout, GA4 loses client ID cookies and generates a brand-new session. GA4 Linker fixes this by automatically appending the _gl parameter to cross-domain links.

Does GA4 Linker support slide-out AJAX carts and popup checkout buttons?

Yes! The Pro and Agency plans use a high-performance MutationObserver that detects dynamically injected DOM elements and AJAX cart drawers in real-time.

Is coding required to set up GA4 Linker?

Zero coding required. Simply install the plugin, enter your Shopify checkout domain(s) in the WordPress admin panel, and GA4 Linker handles link and form decoration automatically.

How does GA4 Linker preserve UTM parameters?

On Personal, Pro, and Agency plans, GA4 Linker captures incoming utm_source, utm_campaign, utm_medium, and gclid parameters from your landing page and persists them through internal navigation directly into the Shopify checkout destination.

🚨 Post-Migration Emergency

GA4 Attribution Broken After Moving Checkout to Shopify? Here's Why

By Dimsquid Engineering • Published Aug 4, 2026 • 5 min read

Moving your checkout experience from WooCommerce or WordPress over to Shopify is a great step for scaling conversion rates. However, many merchants hit a wall immediately after migration: GA4 revenue attribution completely collapses into Direct / (none).

The Domain Shift Problem

When your checkout lived directly on WordPress (e.g. yoursite.com/checkout), Google Analytics tracked users in a single first-party cookie environment.

Moving to Shopify shifts checkout to a different domain (checkout.yourbrand.com or yoursite.myshopify.com). Without cross-domain _gl parameter decoration, GA4 treats every visitor arriving at checkout as a new customer.

Related Guides in This Cluster:

Fix Post-Migration GA4 Tracking Instantly

GA4 Linker automatically decorates links, forms, and slide-out carts so your Shopify migration doesn't destroy ad ROAS.

Download GA4 Linker Plugin →