diff --git a/packages/google_sign_in/CHANGELOG.md b/packages/google_sign_in/CHANGELOG.md
index 0a4e8d21cca8..23ba5809166e 100644
--- a/packages/google_sign_in/CHANGELOG.md
+++ b/packages/google_sign_in/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 4.0.3
+
+* Support to requesting serverAuthCode on Android
+
 ## 4.0.2
 
 * Add missing template type parameter to `invokeMethod` calls.
diff --git a/packages/google_sign_in/android/src/main/java/io/flutter/plugins/googlesignin/GoogleSignInPlugin.java b/packages/google_sign_in/android/src/main/java/io/flutter/plugins/googlesignin/GoogleSignInPlugin.java
index d2fc260c7b1c..382237fc1d76 100755
--- a/packages/google_sign_in/android/src/main/java/io/flutter/plugins/googlesignin/GoogleSignInPlugin.java
+++ b/packages/google_sign_in/android/src/main/java/io/flutter/plugins/googlesignin/GoogleSignInPlugin.java
@@ -66,7 +66,8 @@ public void onMethodCall(MethodCall call, Result result) {
         String signInOption = call.argument("signInOption");
         List<String> requestedScopes = call.argument("scopes");
         String hostedDomain = call.argument("hostedDomain");
-        delegate.init(result, signInOption, requestedScopes, hostedDomain);
+        boolean requestAuthCode = call.argument("requestAuthCode");
+        delegate.init(result, signInOption, requestedScopes, hostedDomain, requestAuthCode);
         break;
 
       case METHOD_SIGN_IN_SILENTLY:
@@ -113,7 +114,7 @@ public void onMethodCall(MethodCall call, Result result) {
   public interface IDelegate {
     /** Initializes this delegate so that it is ready to perform other operations. */
     public void init(
-        Result result, String signInOption, List<String> requestedScopes, String hostedDomain);
+        Result result, String signInOption, List<String> requestedScopes, String hostedDomain, boolean requestAuthCode);
 
     /**
      * Returns the account information for the user who is signed in to this app. If no user is
@@ -210,7 +211,7 @@ private void checkAndSetPendingOperation(String method, Result result, Object da
      */
     @Override
     public void init(
-        Result result, String signInOption, List<String> requestedScopes, String hostedDomain) {
+        Result result, String signInOption, List<String> requestedScopes, String hostedDomain, boolean requestAuthCode) {
       try {
         GoogleSignInOptions.Builder optionsBuilder;
 
@@ -221,7 +222,8 @@ public void init(
             break;
           case DEFAULT_SIGN_IN:
             optionsBuilder =
-                new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN).requestEmail();
+                new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
+                        .requestEmail();
             break;
           default:
             throw new IllegalStateException("Unknown signInOption");
@@ -238,8 +240,13 @@ public void init(
                 .getIdentifier(
                     "default_web_client_id", "string", registrar.context().getPackageName());
         if (clientIdIdentifier != 0) {
-          optionsBuilder.requestIdToken(registrar.context().getString(clientIdIdentifier));
+          final String clientIdFromContext = registrar.context().getString(clientIdIdentifier);
+          optionsBuilder.requestIdToken(clientIdFromContext);
+          if (requestAuthCode) {
+              optionsBuilder.requestServerAuthCode(clientIdFromContext);
+          }
         }
+
         for (String scope : requestedScopes) {
           optionsBuilder.requestScopes(new Scope(scope));
         }
@@ -361,6 +368,7 @@ private void onSignInAccount(GoogleSignInAccount account) {
       response.put("id", account.getId());
       response.put("idToken", account.getIdToken());
       response.put("displayName", account.getDisplayName());
+      response.put("authCode", account.getServerAuthCode());
       if (account.getPhotoUrl() != null) {
         response.put("photoUrl", account.getPhotoUrl().toString());
       }
diff --git a/packages/google_sign_in/lib/google_sign_in.dart b/packages/google_sign_in/lib/google_sign_in.dart
index 740188fd8767..6d78da4bfb46 100755
--- a/packages/google_sign_in/lib/google_sign_in.dart
+++ b/packages/google_sign_in/lib/google_sign_in.dart
@@ -36,7 +36,8 @@ class GoogleSignInAccount implements GoogleIdentity {
         email = data['email'],
         id = data['id'],
         photoUrl = data['photoUrl'],
-        _idToken = data['idToken'] {
+        _idToken = data['idToken'],
+        authCode = data['authCode'] {
     assert(id != null);
   }
 
@@ -60,6 +61,9 @@ class GoogleSignInAccount implements GoogleIdentity {
   @override
   final String photoUrl;
 
+  //TODO Always returns empty on IOS
+  final String authCode;
+
   final String _idToken;
   final GoogleSignIn _googleSignIn;
 
@@ -157,14 +161,16 @@ class GoogleSignIn {
   /// The [hostedDomain] argument specifies a hosted domain restriction. By
   /// setting this, sign in will be restricted to accounts of the user in the
   /// specified domain. By default, the list of accounts will not be restricted.
-  GoogleSignIn({this.signInOption, this.scopes, this.hostedDomain});
+  GoogleSignIn({this.signInOption, this.scopes, this.hostedDomain, this.requestAuthCode = false});
 
   /// Factory for creating default sign in user experience.
-  factory GoogleSignIn.standard({List<String> scopes, String hostedDomain}) {
+  factory GoogleSignIn.standard({List<String> scopes, String hostedDomain, bool requestAuthCode}) {
     return GoogleSignIn(
         signInOption: SignInOption.standard,
         scopes: scopes,
-        hostedDomain: hostedDomain);
+        hostedDomain: hostedDomain,
+        requestAuthCode: requestAuthCode,
+    );
   }
 
   /// Factory for creating sign in suitable for games. This option must not be
@@ -201,6 +207,9 @@ class GoogleSignIn {
   /// Domain to restrict sign-in to.
   final String hostedDomain;
 
+  /// Set if server-side login is required
+  final bool requestAuthCode;
+
   StreamController<GoogleSignInAccount> _currentUserController =
       StreamController<GoogleSignInAccount>.broadcast();
 
@@ -213,9 +222,9 @@ class GoogleSignIn {
 
   Future<GoogleSignInAccount> _callMethod(String method) async {
     await _ensureInitialized();
-
-    final Map<String, dynamic> response =
-        await channel.invokeMapMethod<String, dynamic>(method);
+    
+    final Map<String, dynamic> response = 
+      await channel.invokeMapMethod<String, dynamic>(method);
     return _setCurrentUser(response != null && response.isNotEmpty
         ? GoogleSignInAccount._(this, response)
         : null);
@@ -235,6 +244,7 @@ class GoogleSignIn {
         'signInOption': (signInOption ?? SignInOption.standard).toString(),
         'scopes': scopes ?? <String>[],
         'hostedDomain': hostedDomain,
+        'requestAuthCode' : requestAuthCode,
       })
         ..catchError((dynamic _) {
           // Invalidate initialization if it errored out.
diff --git a/packages/google_sign_in/pubspec.yaml b/packages/google_sign_in/pubspec.yaml
index 4a14005956ca..f9c18839b048 100755
--- a/packages/google_sign_in/pubspec.yaml
+++ b/packages/google_sign_in/pubspec.yaml
@@ -3,7 +3,7 @@ description: Flutter plugin for Google Sign-In, a secure authentication system
   for signing in with a Google account on Android and iOS.
 author: Flutter Team <flutter-dev@googlegroups.com>
 homepage: https://github.com/flutter/plugins/tree/master/packages/google_sign_in
-version: 4.0.2
+version: 4.0.3
 
 flutter:
   plugin: