Products Google APIs for iOS Reference GGLContext(SignIn) Category GGLContext(SignIn) Category Reference Overview This category extends GGLContext with the Google Sign In service. To integrate, import GGLContext+SignIn.h. [GIDSignIn sharedInstance] should be ready to use after calling -[[GGLContext sharedInstance] configureWithError:]. See alsoGGLContext Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated November 10, 2015.