Track Form Submission via Thank You Page (GA4 Event via GTM)

Objective:

Track successful form submissions for gated resources (e.g. eBooks, guides) by firing a generate_lead event when users land on the thank-you page, after submitting a form.

Scenario Summary:

• A user visits a resource form page (e.g., /resource-name)
• They fill in the form to download the resource
• After submission, they are redirected to a thank-you page (e.g., /resource-name/thank-you)
• You want to track the arrival on this thank-you page as a GA4 event

Step 1: Create a Page View Trigger for the Thank You Page

1. In GTM, go to Triggers
2. Click New
3. Name your trigger: Page View – Resource Thank You
4. Trigger Configuration → Select Page View
5. Choose: Some Page Views
6. Set condition: Page Path contains thank-you
   Or more specific: Page Path matches RegEx ^/resources/.*/thank-you$
7. Click Save

Step 2: Create the GA4 Event Tag

1. Go to Tags → Click New
2. Name it: GA4 – generate_lead (Resource Download)
3. Tag Configuration → Select Google Analytics: GA4 Event
4. Under Configuration Tag, select your GA4 Config tag
5. Event Name: generate_lead
6. Add Event Parameters (optional but helpful for reporting):
   resource_name : {{Page Path}}

        form_type     : resource_form

       If you want more specific values like the actual resource title, you can create a Lookup Table variable based on URL or use DOM scraping.

Step 3: Connect the Trigger to the Tag

1. In the tag configuration, scroll to Triggering
2. Choose: Page View – Resource Thank You
3. Click Save

Step 4: (Optional) Create a Lookup Table for Resource Name

1. Go to Variables → Click New
2. Variable Type: Lookup Table
3. Input Variable: Page Path
4. Example mapping:

Input	Output
/ebooks/seo	SEO Guide
/ebooks/seo/thank-you	SEO Guide
/whitepapers/ads	Ads Whitepaper
/whitepapers/ads/thank-you	Ads Whitepaper

1. Output Variable Name: resource_name
2. Use this variable in the GA4 tag’s parameters

Step 5: Test in Preview Mode

1. Click Preview in GTM
2. Enter your resource form page URL → Click Connect
3. Fill in the form and submit
4. When you’re redirected to /thank-you, check if:
   • Page View – Resource Thank You fires
   • GA4 tag generate_lead fires
   • Parameters like resource_name are captured

Step 6: Publish Your GTM Changes

1. Click Submit → Publish
2. Name the version: GA4 Event – Resource Download Tracking

Result

Every time a user submits a resource form and lands on the thank-you page, a GA4 event named generate_lead will be triggered, allowing you to:

• Attribute leads to specific content offers
• Measure the effectiveness of resource downloads
• Build audiences or conversions in GA4