Gemini grounds its answers in Google Search, so weak Google visibility usually explains weak Gemini visibility. Unlike AI Overviews, Gemini genuinely is governed by Google-Extended, so a blocking rule there will exclude you. It is also a separate surface from AI Overviews and can answer differently.

The short version

Why this happens

The first thing worth separating is that Gemini and AI Overviews are not the same product, even though both are Google and both generate answers. Overviews appear above search results. Gemini is a standalone assistant with its own interface, apps and Workspace integration. They can and do give different answers to the same question, so testing one tells you less about the other than people assume.

Grounding. When Gemini answers a question about current facts or specific businesses, it grounds the response in Google Search results. That makes your conventional Google visibility the foundation rather than an alternative to this work. If Google cannot find you for the underlying query, Gemini generally cannot either.

Google-Extended. Here is where Gemini differs from AI Overviews in a way that matters. As covered on the AI Overviews page, Google-Extended does not control Overviews inclusion. It does govern Gemini. A firm that added User-agent: Google-Extended / Disallow: / has taken itself out of Gemini while remaining in Search and Overviews. That is a legitimate choice if made deliberately. It is very often not deliberate.

The knowledge graph. Google has spent two decades building an entity graph, and Gemini can check you against it. This cuts both ways. A business with clean, consistent entity signals, a Knowledge Panel and coherent structured data is unusually well placed here. A business whose name, description and details disagree across sources is unusually badly placed, because Google has more opportunities than most systems to notice the inconsistency.

Workspace Gemini. In an enterprise context, Gemini can also draw on the user’s own Gmail, Drive and Docs. If a prospect asks Workspace Gemini about suppliers, part of the answer may come from their own internal documents. You cannot optimise into somebody else’s tenant, and it is worth knowing that some of this surface is genuinely closed to you.

How to check it yourself

  1. Ask Gemini and check an AI Overview for the same query. Different answers confirm they are separate surfaces and tell you which one is your actual problem.
  2. Check robots.txt for Google-Extended. This is the single highest-value check on this page and it takes ten seconds.
  3. Search your brand in Google and look for a Knowledge Panel. Its absence, or wrong details in it, points straight at an entity problem.
  4. Ask Gemini to describe your business and see whether it hedges, conflates you with another firm, or gets the category wrong.
  5. Verify your Google Business Profile is complete and consistent with your site.

What to do about it

  1. Remove an unintended Google-Extended block. If the block was deliberate for training reasons, understand that the cost is Gemini visibility and decide knowingly.
  2. Fix entity consistency across Google’s surfaces: Business Profile, structured data, and the details Google can cross-check. Our entity map is the pattern we use.
  3. Keep classic Google visibility healthy. Grounding depends on it.
  4. Pursue a Knowledge Panel if you plausibly qualify, and correct it if it exists and is wrong.
  5. Do not assume AI Overview work covers Gemini. Measure them separately.

The full method is in how to appear in Google Gemini.

Platform behaviour changes. This page reflects how Gemini worked in August 2026 and is reviewed quarterly.

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