Short answer
Gemini relies on the Google Knowledge Graph and your Google Business Profile more heavily than any other AI engine, since it is built to answer confidently about real-world entities Google already has verified data on. A complete, active GBP is your primary lever. Google-Extended is a distinct crawler control from Googlebot and from AI Overviews, so blocking it removes you from Gemini specifically without touching your normal Search rankings.
Gemini and AI Overviews are both Google, but they are not the same lever
It is a common and costly mix-up: treating "optimize for Google's AI" as one task. AI Overviews runs inside Google Search itself, drawing on the organic web index and triggering primarily for hybrid informational-commercial queries. Gemini is a separate conversational product (the standalone app, and increasingly embedded across Google's ecosystem) that answers open-ended questions like "what's a good HVAC company in Orlando" by reasoning over the Knowledge Graph and other Google-owned data sources first, with open web retrieval playing a supporting role rather than the primary one.
The practical difference: AI Overviews answers a specific factual question and cites a web page. Gemini is more likely to answer "which business should I use" by naming entities it already has confidence in from the Knowledge Graph — which for a local business almost always traces back to Google Business Profile data.
Your Google Business Profile is the primary lever here, full stop
No engine in this group depends on a single data source as heavily as Gemini depends on GBP. Category selection, business description, services list, attributes, photos, hours, and review volume and content all feed the entity profile Gemini draws on when it reasons about which local businesses are legitimate, relevant, and well-regarded for a given query. A thin or neglected GBP does not just cost you Local Pack visibility the way it always has — it removes the primary raw material Gemini uses to know you exist as a real, categorized entity at all.
Go through GBP with unusual thoroughness: every applicable service listed individually rather than lumped into one generic category, a description that uses the specific terms customers actually search rather than marketing language, and attributes filled out completely (appointment-only, free estimates, emergency service, whatever applies).
Knowledge Graph entity establishment
Beyond GBP specifically, Gemini benefits from your business being a clearly-established entity in the broader Knowledge Graph, which Google builds from a mix of structured data, corroborating mentions across the web, and consistency signals. A business that only exists as a GBP listing with no corroborating presence elsewhere is a weaker entity than one confirmed by a Wikipedia mention, a Chamber of Commerce listing, local press coverage, or an industry association directory.
This is slower-moving work than a GBP cleanup, but it compounds: every additional credible, consistent mention of your business name, category, and location across the web strengthens how confidently Google's systems, Gemini included, treat you as a real, verifiable entity rather than an ambiguous or unverified one.
sameAs consistency ties it all together
Use the sameAs property in your schema markup to explicitly link your website's entity to your Google Business Profile, Facebook page, industry directory profiles, and any other authoritative presence. This gives Google's entity resolution a direct, machine-readable confirmation that all these profiles refer to the same business, rather than making it infer the connection from matching names and addresses alone. Inconsistent business names, old addresses on stale directory listings, or a defunct social profile still floating around all work against this — an entity audit that cleans up old, incorrect, or duplicate listings is worth doing before adding new ones.
Google-Extended is a separate switch — check it specifically
Google-Extended is the crawler control that governs whether your content can be used for Gemini and Vertex AI, and it is entirely separate from Googlebot, which governs standard Search indexing, and separate from Google-InspectionTool or other Google crawlers. This separation was intentional on Google's part, letting site owners opt out of AI usage without affecting Search rankings.
The catch: some robots.txt templates and plugins, especially certain SEO or privacy plugins that added blanket "block AI crawlers" rules in the last couple of years, blocked Google-Extended by default without the site owner realizing it. This has zero effect on your normal Google Search rankings, which is exactly why it goes unnoticed, but it silently removes you from Gemini answers. Check your robots.txt for the literal string "Google-Extended" and remove any disallow rule against it if you want Gemini eligibility.
Verifying your Google-Extended status properly, not just skimming robots.txt
There is no Search Console report that tells you whether Google-Extended is fetching your pages, which is exactly why so many sites carry an accidental block for months without anyone noticing. Reading robots.txt is the definitive check, but read it the way a crawler does: a wildcard block under User-agent: * catches Google-Extended unless a more specific Allow rule for Google-Extended appears after it, and a CDN or WAF rule can override an otherwise-clean robots.txt entirely, the same way it can for GPTBot or ClaudeBot.
Confirm three layers, not one: fetch yoursite.com/robots.txt directly and search for the literal token "Google-Extended," check your CDN or WAF dashboard (Cloudflare's Security > Bots panel is the common culprit) for any managed rule blocking AI crawlers at the edge before robots.txt is even consulted, and, if you manage server logs, grep them for Google-Extended visits over the last month as a secondary signal. Do not treat an absence of log hits as proof of a block on its own, since Google-Extended crawls in batches tied to training and grounding cycles rather than continuously, so a quiet week is not automatically a broken week. Robots.txt and CDN configuration remain the authoritative signals; logs are a supporting check, not the final word.
Wikidata gives the Knowledge Graph something structured to ingest directly
Of the corroborating sources that strengthen an entity, a Wikidata item is the most direct, because Wikidata is machine-readable by design and feeds Google's Knowledge Graph in a more structured way than an ordinary web mention does. Wikidata has a far lower notability bar than Wikipedia itself, so a local business with any distinguishing fact, a founding date, an award, a documented first-of-its-kind service in the area, can usually qualify for an entry even without qualifying for a Wikipedia article.
A useful Wikidata item for a local business fills in the core properties precisely: instance of (business or the specific industry subtype), location with coordinates, official website, and inception date, plus identifiers linking to any other authoritative profile you hold. Once the item exists, keep it current the same way you would a GBP listing, since a stale or sparse Wikidata entry does little more good than not having one, while an accurate, well-linked one gives Gemini a clean, structured confirmation of who you are that does not depend on Google having to infer anything from scattered mentions.
Related questions
Is optimizing for Gemini the same as optimizing for Google AI Overviews?
No. AI Overviews runs inside Search and draws on the organic web index for hybrid queries. Gemini is a separate conversational product that leans much more heavily on the Knowledge Graph and Google Business Profile data.
Can blocking Google-Extended hurt my regular Google rankings?
No. Google-Extended is a separate crawler control from Googlebot. Blocking it removes your eligibility for Gemini and Vertex AI specifically, without affecting standard Search indexing or rankings.
Why does my Google Business Profile matter so much for Gemini specifically?
Gemini reasons over the Knowledge Graph first when answering entity-based questions like "which business should I use," and for local businesses that Knowledge Graph data is built substantially from Google Business Profile signals — category, attributes, services, and reviews.
What does sameAs schema actually do for Gemini visibility?
It explicitly links your website to your other verified profiles (GBP, Facebook, directories), giving Google's entity resolution a direct signal that these all represent the same business rather than requiring it to infer the match.
Could an SEO plugin be blocking Gemini without my knowledge?
Yes, this happens often. Some plugins added blanket AI-crawler blocking rules that included Google-Extended by default. Since it does not affect Search rankings, most owners never notice until they check robots.txt directly.
Is a Wikidata entry worth pursuing if my business will never qualify for Wikipedia?
Yes. Wikidata has a much lower notability bar than Wikipedia and feeds the Knowledge Graph directly in structured form, so a business with any distinguishing fact, an award, a founding date, a unique specialization, can usually create and maintain an accurate item even with no realistic path to a Wikipedia article.
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