Value of type 'GIDSignIn' has no member 'presentingViewController'

In viewDidLoad() of your ViewController add the following line:

GIDSignIn.sharedInstance()?.uiDelegate = self

and make the ViewController conform to GIDSignInUIDelegate protocol.

Your code is correct if you are using Google Sign-In v5.0:

GIDSignIn.sharedInstance()?.presentingViewController = self

But since you've installed 4.4.0, you should accept Vitaly Shpinyov's answer.

Or upgrade Google Sign-In to 5.0 or higher by editing your podfile:

pod 'GoogleSignIn', '~> 5.0'

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