n8n Lead Qualification Workflow: GPT-4o + Gmail + Google Sheets

Instant Lead Qualification with n8n + GPT-4o

This n8n Lead Qualification Workflow automatically receives inbound enquiries, enriches and scores each lead using GPT-4o, and then routes it to the right outcome—priority email via Gmail, nurture tracking in Google Sheets, or a polite decline message.

What this workflow does

• Receives new leads via a POST webhook on /lead with the enquiry details.
• Applies your ICP rules + urgency signals by attaching them to the incoming lead data.
• Runs an OpenAI (GPT-4o) orchestrator agent that calls two sub-workflows: one to enrich the lead and one to score it (producing a fit score (1–10) plus an urgency flag).
• Routes high-fit or urgent leads by sending a priority notification email to the owner using the Gmail tool.
• Routes mid-fit leads by appending a row to your nurture list in Google Sheets.
• Handles low-fit leads (or those matching decline rules) by sending a polite decline email via Gmail to the enquirer.

Use cases

• Turn website or form submissions into an automatic lead qualification pipeline without manual review.
• Speed up response times for urgent, high-scoring prospects with Gmail priority notifications.
• Maintain a clean mid-tier nurture list in Google Sheets for follow-up campaigns.
• Standardize decline messaging using your decline rules, reducing wasted time.

Technical details

• Nodes/Tools: set, webhook, gmail tool, n8nn8n-nodes-langchainagent, and google sheets tool (plus a Sticky Note for guidance).
• Setup: provide OpenAI API credentials for GPT-4o, configure enrich_lead and score_lead sub-workflow workflowId values, connect Gmail (update owner email), and set your Google Sheets documentId and sheetName.