connect google calendar to chatgpt or gemini

You can use ChatGPT’s built-in Connectors (no coding):

  • in the ChatGPT app or web interface, go to Settings → Connectors, connect your Google Calendar (and Gmail if you want additional context)
  • Grant permission

Once connected, you can ask questions like “What’s on my calendar today?” or “Do I have any conflicts tomorrow?” directly in chat.

Note

I had to have a few goes at this and do a re-connection for it work properly.

But what about secondary calendars?

I wanted to look through a secondary "planning" calendar i have. But that did not work at all ❌😬

  • Seems that that on my google workspace the calendar is not being shared via the API somehow (??)
  • 🎉 The hacky workaround was to share the secret ics link
  • BUT that only worked in Gemini
    • In ChatGPT it still could not access. It claimed (who knows if true) "The environment I’m running in does not allow arbitrary binary/text file downloads from Google endpoints, even when they are public or secret URLs."

ChatGPT: 😞 Can't filter by calendar

So for my use case it didn't work.

I wanted to pull and review just the events from a specific calendar "Rufus planning".

But … the current integration exposes events without exposing the underlying calendar IDs, so those events can’t be isolated by calendar name.

Warning

I actually think the bigger issue was that chatgpt could not even access that calendar (see below). The above was chatgpt's analysis which i think turned out to be wrong with further digging.

Both Gemini and ChatGPT incorrectly claimed that we had found a workaround

Gemini claimted it had found this workaround for accessing the calendar … BUT it did NOT work 🤦‍♂️

The Issue

By default, Gemini's calendar integration often only "sees" your Primary calendar (the one associated with your main email address). Even if you own secondary calendars—like a "Planning" or "Team" calendar—they may not appear in the AI's list of accessible tools, even if they are visible in your browser.

The Solution: Direct Calendar ID Mapping

To bypass this "Primary-only" limitation, you can force a connection by providing the unique Calendar ID.

  1. Locate the ID: In Google Calendar desktop, go to the secondary calendar's Settings and sharing.

  2. Copy the String: Scroll to Integrate calendar and copy the Calendar ID (e.g., [email protected]).

  3. Paste into Chat: Provide this ID directly to Gemini. This allows the API to "ping" the specific calendar directly, bypassing the standard list.

ChatGPT claimed the workaround worked but it didn't

What also became clearer was that neither Gemini not ChatGPT could access this "secondary" calendar. i actually think that was the main issue.

Yes — providing the calendar ID does resolve this. The limitation wasn’t access to the events themselves, but lack of visibility of calendar metadata (specifically calendar IDs) in the default integration. With the explicit calendar ID (artearthtech.com_r63nmilujsalhfgcq2bj2j3vmc@group.calendar.google.com), events can be queried directly from that calendar and cleanly isolated.

And then after trying it …

I tried, but I still can’t execute a calendar-ID–scoped query with this connector.

…

there is no callable operation exposed to me that can fetch events scoped to that calendar. I can only retrieve events from the merged view of all accessible calendars, without a way to say “only this calendar,” and without calendar IDs attached to returned events.

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