# GeminiEndpointConfig Gemini backend routing. DEVELOPER does not use projectId or location; GOOGLE_CLOUD requires projectId and defaults an omitted location to global. - `backend` (`GeminiApiBackend`, required): Google API surface. UNSPECIFIED is invalid when this configuration is supplied on a write. - `projectId` (`string | null`, optional): Google Cloud resource project. Required for GOOGLE_CLOUD and unused for DEVELOPER; this is distinct from the ADC quota project. - `location` (`string | null`, optional): Google Cloud location. Valid only for GOOGLE_CLOUD; omission defaults to global. [TypeScript](../../typescript.md) Related types — open only those used by your request: - [GeminiApiBackend](GeminiApiBackend.md)