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