docs(gemini): add Google Gemini guide

website/docs/integrations/providers.md

@@ -42,6 +42,8 @@ You need at least one way to connect to an LLM. Use `hermes model` to switch pro
 | **LM Studio** | `hermes model` → "LM Studio" (provider: `lmstudio`, optional `LM_API_KEY`) |
 | **Custom Endpoint** | `hermes model` → choose "Custom endpoint" (saved in `config.yaml`) |
 
+For the official API-key path, see the dedicated [Google Gemini guide](/docs/guides/google-gemini).
+
 :::tip Model key alias
 In the `model:` config section, you can use either `default:` or `model:` as the key name for your model ID. Both `model: { default: my-model }` and `model: { model: my-model }` work identically.
 :::