Just installed newest version of Google SignIn SDK (2.2.0) and was wondering how to change look of default sign in button since it is plain view? The answer is – you can’t do it. But, there is a hack as always. You don’t need to use GIDSignInButton at all, just leave your current sign-in button, and in push action put:
[[GIDSignIn sharedInstance] signIn];
This will do all required stuff using your very own custom button.