GuideSep 27, 2026 · Every plan · 2 min read
How to post to Facebook from Gemini Spark
Connect Rebbel to Gemini Spark and your Facebook Page once, and it can draft Facebook posts — only published after you approve them.
Gemini Spark can't reach Facebook by itself. Add the Rebbel custom app and connect your Page once, and you can go from "draft me a post about Saturday's sale" to an approved-and-ready Facebook post without leaving the chat. We tested the drafting step ourselves before writing this.
At a glance
- Plans
- Every plan
- Posts to
- Facebook Pages
- Needs
- A Facebook Page + Rebbel
- Tested on
- Google AI Pro
What you need
A Facebook Page for your business (Rebbel publishes to Facebook Pages) and a Rebbel account. Rebbel's Free plan includes Facebook publishing. We tested Gemini Spark on a Google AI Pro account, where it offers custom apps.
Connect it once
Add Rebbel to Gemini as a custom app (steps on our setup page) and switch to Gemini Spark. Then connect your Page on Rebbel's Connections page: Facebook asks you to choose which Page to share and to allow publishing.
What we actually saw
We asked Spark to generate a campaign for a dogfood test. It read our brand list and checked the Facebook connection first, then stopped on a confirmation screen naming the exact tool call — "Let Gemini use 'generate campaign' from Rebbel", with the channel, objective and brand id spelled out — before it would write anything. We clicked Allow.
A minute or so later, two real Facebook posts existed on the account: a headline, an angle and a generated image each, both sitting in review. Nothing published — Rebbel's approval gate held regardless of what Google's own confirmation screen had already asked.
Who it's for
- Businesses that run their marketing from a Facebook Page and already use Gemini Spark.
Set it up
- Add Rebbel to Gemini as a custom app and switch to Gemini Spark.
- Connect your Facebook Page on Rebbel's Connections page.
- Ask it to draft a post, then approve it from the dashboard.
The full walkthrough: Connect Facebook & Instagram.
Good to know
- Rebbel publishes to Facebook Pages.
- We tested this on a Google AI Pro account.
- Nothing is posted until you approve it — checked on Rebbel's servers, not just in the chat.
Common questions
Can Gemini Spark post to Facebook directly?
Not on its own — it needs a connector with access to your Page. With Rebbel connected it drafts Facebook posts, and once you approve one, Rebbel publishes it to your Page.
Does it post to a Page or a personal profile?
Rebbel publishes to Facebook Pages, so connect the Page for your business.
Does Google ask before it writes anything?
Yes — in our test, Gemini Spark showed a confirmation screen naming the exact tool call before drafting a campaign, and we had to click Allow.
Keep reading
GuideSep 26, 2026 · Every plan
Gemini Spark for social media campaigns: a marketing department in your chat
Gemini Spark can write a post. With Rebbel connected it runs the whole loop: brand guide, strategy, campaigns and publishing — you approve every post.
Last reviewed Nov 11, 2026.