Process Gmail invoice PDFs with Gemini OCR, GPT-4o, Slack and Google Sheets

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Built by Rahul Joshi Rahul Joshi
Created on May 13, 2026

About This Workflow

Process Gmail invoice PDFs with Gemini OCR, GPT-4o, Slack and Google Sheets is a free n8n automation workflow created by Rahul Joshi. It uses Code, Gmail, Google Sheets, HTTP Request and OpenAI for AI automation. Import it into n8n to automate this task instantly — no coding required.

Nodes Used (6)

Code
n8n-nodes-base.code
Gmail
n8n-nodes-base.gmail
Google Sheets
n8n-nodes-base.googleSheets
HTTP Request
n8n-nodes-base.httpRequest
OpenAI
@n8n/n8n-nodes-langchain.openAi
Slack
n8n-nodes-base.slack