n8n Lead Routing Workflow: GPT-4o, Gmail & Google Sheets

Instant lead routing with GPT-4o—webhook in, best next action out

This n8n Lead Routing Workflow automatically receives new enquiry leads on a webhook, enriches and scores them with a GPT-4o agent, then routes each lead via Gmail and Google Sheets for immediate action or nurture—based on your ICP rules and urgency criteria.

What this workflow does

• Receives leads via webhook: A POST request hits the /lead webhook containing the new enquiry data.
• Applies your ICP rules & urgent-signal criteria: It attaches your ideal customer profile (ICP) rules and urgency signals to the lead payload.
• Enriches using GPT-4o orchestration: A GPT-4o orchestrator agent calls an enrichment sub-workflow (referenced as enrich_lead) to extract structured, knowable facts from the enquiry.
• Scores fit and urgency: A scoring sub-workflow (referenced as score_lead) assigns a 1–10 fit score and an urgency flag using the enquiry, enrichment, and ICP.
• Routes leads automatically:
  • High-scoring or urgent: Sends a priority Gmail email to the business owner with the AI-generated summary and contact details.
  • Mid-scoring: Appends the lead to a Google Sheets nurture list with enquiry details, score, and status.
  • Low-scoring / out-of-scope: Sends a polite decline email to the enquirer via Gmail.

Use cases

• SaaS teams routing inbound demos to sales vs. nurture automatically
• Agencies prioritizing “urgent” leads and rejecting out-of-scope enquiries with a consistent tone
• Automation engineers needing a practical n8n lead routing pattern using GPT-4o, Gmail, and Google Sheets

Technical details

• Nodes/tech stack include: webhook, set, n8nn8n-nodes-langchainagent (GPT-4o orchestrator agent), gmail tool, and google sheets tool
• Requires: OpenAI credentials for the GPT-4o chat model, sub-workflow references for enrich_lead and score_lead, Gmail owner inbox (e.g., replace owner@example.com), and Google Sheets credentials

Result: a complete, SEO-friendly n8n automation workflow that turns inbound enquiries into timely email routing and structured nurture tracking.