Where to save GoogleService-Info.plist in Flutter without Xcode?

If you want to avoid using Xcode, you have to manually edit this file :/ios/Runner.xcodeproj/project.pbxproj

You will need to reference GoogleService-Info.plist in order to make it included during the build process.

Here are the 4 differents sections where you need to add a line (see example line for GoogleService-Info.plist):

/* Begin PBXBuildFile section */        1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };        3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };        3B80C3941E831B6300D905FE /* App.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 3B80C3931E831B6300D905FE /* App.framework */; };        3B80C3951E831B6300D905FE /* App.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 3B80C3931E831B6300D905FE /* App.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };        74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74858FAE1ED2DC5600515810 /* AppDelegate.swift */; };        9705A1C61CF904A100538489 /* Flutter.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 9740EEBA1CF902C7004384FC /* Flutter.framework */; };        9705A1C71CF904A300538489 /* Flutter.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 9740EEBA1CF902C7004384FC /* Flutter.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };        97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };        DE4C455E21DE1E4300EA0709 /* GoogleService-Info.plist in Resources */ = {isa = PBXBuildFile; fileRef = DE4C455D21DE1E4300EA0709 /* GoogleService-Info.plist */; };        97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };        97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };/* End PBXBuildFile section */

Here :

/* Begin PBXFileReference section */        1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };        1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };        3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };        3B80C3931E831B6300D905FE /* App.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = App.framework; path = Flutter/App.framework; sourceTree = "<group>"; };        74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Runner-Bridging-Header.h"; sourceTree = "<group>"; };        74858FAE1ED2DC5600515810 /* AppDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };        7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };        9740EEB21CF90195004384FC /* Debug.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Debug.xcconfig; path = Flutter/Debug.xcconfig; sourceTree = "<group>"; };        9740EEB31CF90195004384FC /* Generated.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Generated.xcconfig; path = Flutter/Generated.xcconfig; sourceTree = "<group>"; };        9740EEBA1CF902C7004384FC /* Flutter.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Flutter.framework; path = Flutter/Flutter.framework; sourceTree = "<group>"; };        97C146EE1CF9000F007C117D /* Runner.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Runner.app; sourceTree = BUILT_PRODUCTS_DIR; };        97C146FB1CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };        97C146FD1CF9000F007C117D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };        97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };        97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };        DE4C455D21DE1E4300EA0709 /* GoogleService-Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = "GoogleService-Info.plist"; sourceTree = "<group>"; };/* End PBXFileReference section */

Here:

97C146F01CF9000F007C117D /* Runner */ = {    isa = PBXGroup;    children = (        97C146FA1CF9000F007C117D /* Main.storyboard */,        97C146FD1CF9000F007C117D /* Assets.xcassets */,        97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */,        97C147021CF9000F007C117D /* Info.plist */,        DE4C455D21DE1E4300EA0709 /* GoogleService-Info.plist */,        97C146F11CF9000F007C117D /* Supporting Files */,        1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */,        1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */,        74858FAE1ED2DC5600515810 /* AppDelegate.swift */,        74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */,    );    path = Runner;    sourceTree = "<group>";};

And here :

/* Begin PBXResourcesBuildPhase section */        97C146EC1CF9000F007C117D /* Resources */ = {            isa = PBXResourcesBuildPhase;            buildActionMask = 2147483647;            files = (                97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */,                3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */,                97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */,                97C146FC1CF9000F007C117D /* Main.storyboard in Resources */,                DE4C455E21DE1E4300EA0709 /* GoogleService-Info.plist in Resources */,            );            runOnlyForDeploymentPostprocessing = 0;        };/* End PBXResourcesBuildPhase section */

Tested successfully with codemagic, this modification made the provided GoogleService-Info.plist included in the App IPA

Somewhere along the line, AppUploader must be using XCode to build an iOS app from your code. While I don't know how they do that (their documentation is scarce on details), the best you can hope for is to put the google-services-info.plist in the right place before uploading the app.

In my projects I always put the google-services-info.plist in the myappname/ios/Runner directory that the Flutter tooling auto-generates. That's where the build then picks it up from.

after a while I bumped into it using the new XCode too I can guarantee you as already suggested that it works in this way.

Enter it under the

iOS -> Runner (here)

PS: From XCode I always took the reference of the file, it did not copy it to me. If anyone has succeeded even without this procedure above I would like to understand exactly how to do it from XCode.