Create & Send Automated GA4 KPI Reports with AI Insights & Gmail

Who’s it for

Marketing, growth, and analytics teams who want a decision-ready GA4 summary—automatically calculated, clearly color-coded, and emailed as a polished HTML report.

How it works / What it does

• Get Client (Form Trigger) collects GA4 Property ID (“Account ID”), Key Event, date ranges (current & previous), Client Name, and recipient email.
• Overall Metrics This Period / Previous Period (GA4 Data API) pull sessions, users, engagement, bounce rate, and more for each range.
• Form Submits This Period / Previous Period (GA4 Data API) fetch key-event counts for conversion comparisons.
• Code normalizes form dates for API requests.
• AI Agent builds a valid HTML email:
  • Calculates % deltas, applies green for positive (#10B981) and red for negative (#EF4444) changes.
  • Writes summary and recommendations.
  • Produces the final HTML only.
• Send a message (Gmail) sends the formatted HTML report to the specified email address with a contextual subject.

How to set up

1. Add credentials: Google Analytics OAuth2, OpenAI (Chat), Gmail OAuth2.
2. Ensure the form fields match your GA4 property and event names; “Account ID” = GA4 Property ID.
   Property ID - https://take.ms/vO2MG
   Key event - https://take.ms/hxwQi
3. Publish the form URL and run a test submission.

Requirements

GA4 property access (Viewer/Analyst) • OpenAI API key • Gmail account with send permission.

Resources

Google OAuth2 (GA4) – https://docs.n8n.io/integrations/builtin/credentials/google/oauth-generic/
OpenAI credentials – https://docs.n8n.io/integrations/builtin/credentials/openai/
Gmail OAuth2 – https://docs.n8n.io/integrations/builtin/credentials/google/
GA4 Data API overview – https://developers.google.com/analytics/devguides/reporting/data/v1