Categorise and label Gmail emails with GPT-4o and OpenAI

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1. Workflow Overview

Automatically organise your Gmail inbox using AI. This workflow categorises every incoming email and applies Gmail labels, keeping only important emails in your inbox while filing everything else a...

Best for

Ticket Management automation workflows
AI Summarization automation workflows
intermediate n8n builders looking for reusable templates

Tools used

@n8n/n8n-nodes-langchain.openai, n8n-nodes-base.filter, n8n-nodes-base.gmail, n8n-nodes-base.gmailtrigger, n8n-nodes-base.stickynote

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Zac Nielsen.

Original n8n.io source

1.1 Workflow description

Title: Categorise and label Gmail emails with GPT-4o and OpenAI
Workflow name: Categorise and label Gmail emails with GPT-4o and OpenAI

Who is this for? Anyone overwhelmed by email clutter who wants inbox zero without manual sorting.

How it works

Gmail Trigger polls your inbox for new emails every minute
AI Categorisation (GPT-4o) analyses each email and assigns a category such as Action Required, Newsletters, Sales Pitches, Client Communication, Receipts, and more
Filter checks if the email requires your attention or can be auto-filed
Label Management removes non-actionable emails from inbox and applies the appropriate Gmail label

Prerequisites

Gmail account with OAuth2 access
OpenAI API key
Gmail labels created for each category you want to use

Setup steps

Import the workflow and connect your Gmail OAuth2 credentials
Add your OpenAI API key
Create Gmail labels matching your categories such as Action Required, Newsletters, People Selling Me Stuff, Admin/Receipts
Run the Get many labels node manually to retrieve your label IDs
Update the Add to folder node with your label ID mapping using the example in the pink sticky note
Customise the AI prompt categories to match your workflow needs
Test with a few emails before activating

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Categorize Email

Type / Role: @n8n/n8n-nodes-langchain.openAi - openAi
Config choices: Version 1.8

Block 2 - Not Worthwhile

Type / Role: n8n-nodes-base.filter - filter
Config choices: Version 2.2

Block 3 - Get Email

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

Block 4 - Add to folder

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

Block 5 - Remove from Inbox

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

Block 6 - Gmail Trigger

Type / Role: n8n-nodes-base.gmailTrigger - gmailTrigger
Config choices: Version 1.3

Block 7 - Get many labels

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.2

Block 8 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 9 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 10 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 11 - Sticky Note3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 12 - Sticky Note4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Categorise and label Gmail emails with GPT-4o and OpenAI
Complexity	intermediate
Nodes	12
Categories	Ticket Management, AI Summarization
Author	Zac Nielsen
Published	05 Feb 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/13221/13221.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Ticket Management workflows AI Summarization workflows

Frequently asked questions

What does Categorise and label Gmail emails with GPT-4o and OpenAI do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Ticket Management, AI Summarization use case.

Zac Nielsen

2 workflows

Nodes

@n8n/n8n-nodes-langchain.openai n8n-nodes-base.filter n8n-nodes-base.gmail n8n-nodes-base.gmailtrigger n8n-nodes-base.stickynote

Complexity

intermediate

Published 05 Feb 2026

Likes 0

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Install path: /data/workflows/13221/13221.json

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Categorise and label Gmail emails with GPT-4o and OpenAI

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Categorize Email

Block 2 - Not Worthwhile

Block 3 - Get Email

Block 4 - Add to folder

Block 5 - Remove from Inbox

Block 6 - Gmail Trigger

Block 7 - Get many labels

Block 8 - Sticky Note

Block 9 - Sticky Note1

Block 10 - Sticky Note2

Block 11 - Sticky Note3

Block 12 - Sticky Note4

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions