Built an automated calendar sync system that polls Google Calendar and writes events into a classified Notion calendar view - keeping scheduling, task management, and project work unified in one workspace.

The Problem

I didn't want to keep switching to Google Calendar to see what was coming up. My project work, tasks, and notes all lived in Notion, but my schedule didn't. I needed calendar events visible alongside everything else — and I wanted them categorised automatically so I could see at a glance what was a client meeting versus a networking event versus personal time.

What I Built

A polling-based sync pipeline that brings Google Calendar events into Notion with automatic classification:

• Gemini Gem for input — I set up a custom Gemini gem that takes event details I give it conversationally and adds them to Google Calendar in the right format.
• 15-minute polling — n8n checks Google Calendar every 15 minutes and picks up any new future events.
• Auto-classification — each event is classified into one of eight categories: Meeting, Call, Networking, Personal, Workshop, Admin, Interview, or Other.
• Notion calendar view — events land in a calendar database view inside Notion, colour-coded and filterable by category.
• New events only — the sync currently handles new events. Updates and cancellations stay in Google Calendar.

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Tech Stack & Features

Platform: n8n

AI: Gemini (event classification + input gem)

API: Google Calendar API, Notion REST API

Key modules: Polling trigger, Gemini AI node, Notion database modules

Patterns: Scheduled polling, AI classification, calendar view sync, event categorisation

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Documentation

SOP - Google Calendar to Notion Sync

Technical Doc - Google Calendar to Notion Sync

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Screenshots

Notion Calendar View