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This powerful n8n workflow automatically generates and publishes Google Business Profile (GMB) posts using topics listed in a Google Sheet.
It uses OpenAI to write SEO-optimized post descriptions and generate AI images based on the topic — then posts them directly to your GMB profile and marks them as published in the sheet.
🎯 Use Case
Perfect for:
- Digital marketers managing local SEO
- Agencies automating content for clients
- Businesses regularly posting to GMB
- Teams managing editorial calendars via Google Sheets
⚙️ Workflow Overview
| 🧩 Node | 🔧 Purpose |
|---|---|
| 🕘 Schedule Trigger | Runs daily at 9AM (configurable) |
| 📄 Get Unpublished Row | Reads a row from Google Sheet where Status is not marked "Published" |
| 🪓 Split Row | Extracts topic and status from the row |
| ✍️ Generate Post Text | Uses OpenAI (GPT-4) to write a compelling, local-business optimized post |
| 🖼 Generate Post Image | Uses DALL·E or similar to create an image matching the topic |
| 📬 Post to GMB | Publishes the generated content to your Google Business Profile |
| ✅ Update Sheet | Marks the status as "Published" in the Google Sheet |
📄 Google Sheet Format
| Column Name | Description |
|---|---|
| Topic | The subject or idea for the GMB post |
| Status | Should be blank or "Unpublished" to trigger the flow |
| Date | (Optional) Posting schedule or note |
| Notes | (Optional) Internal info — not used in the automation |
🔐 Google My Business API Setup
1. Google Cloud Configuration
- Go to Google Cloud Console
- Enable the Google My Business API
- Create OAuth2 Client ID and Client Secret
- Add this required scope:
https://www.googleapis.com/auth/business.manage
2. n8n Credential Setup
- In n8n, go to Credentials > Google OAuth2
- Use your Client ID and Client Secret
- Use this credential in GMB-related nodes
🧠 OpenAI Prompt Customization
Modify the prompt in the OpenAI node to match your brand’s voice:
Example Prompt
Write a short, engaging Google Business Post about: "{{ $json.topic }}".
Make it suitable for a local audience and include a subtle call to action.
🧪 Optional Enhancements
- Add If node to delay publishing on certain days
- Use Slack or Email notifications to alert before/after posting
- Use Multiple Businesses by adding a Router or Switch node per GMB account
✅ Benefits
- 🔁 Fully automated GMB posting
- ✍️ SEO-optimized, AI-written content
- 🖼 Matching images for visual engagement
- 📊 Maintains a content log via Google Sheets
- 🧠 Easily customizable prompt logic and schedule