diff --git a/src/Ryujinx.Horizon/Am/Ipc/Controllers/GlobalStateController.cs b/src/Ryujinx.Horizon/Am/Ipc/Controllers/GlobalStateController.cs
new file mode 100644
index 000000000..391fc9ef8
--- /dev/null
+++ b/src/Ryujinx.Horizon/Am/Ipc/Controllers/GlobalStateController.cs
@@ -0,0 +1,125 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.Horizon.Common;
+using Ryujinx.Horizon.Sdk.Am;
+using Ryujinx.Horizon.Sdk.Am.Controllers;
+using Ryujinx.Horizon.Sdk.Sf;
+
+namespace Ryujinx.Horizon.Am.Ipc.Controllers
+{
+    partial class GlobalStateController : IGlobalStateController
+    {
+        [CmifCommand(0)]
+        public Result RequestToEnterSleep()
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return AmResult.Stubbed;
+        }
+
+        [CmifCommand(1)]
+        public Result EnterSleep()
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return AmResult.Stubbed;
+        }
+
+        [CmifCommand(2)]
+        public Result StartSleepSequence(bool arg0)
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return Result.Success;
+        }
+
+        [CmifCommand(3)]
+        public Result StartShutdownSequence()
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return Result.Success;
+        }
+
+        [CmifCommand(4)]
+        public Result StartRebootSequence()
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return Result.Success;
+        }
+
+        [CmifCommand(9)]
+        public Result IsAutoPowerDownRequested(out bool arg0)
+        {
+            arg0 = false;
+            // Uses #idle:sys cmd1
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return Result.Success;
+        }
+
+        [CmifCommand(10)]
+        public Result LoadAndApplyIdlePolicySettings()
+        {
+            // Uses #idle:sys cmd LoadAndApplySettings
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return Result.Success;
+        }
+
+        [CmifCommand(11)]
+        public Result NotifyCecSettingsChanged()
+        {
+            // Uses #omm cmd NotifyCecSettingsChanged
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return Result.Success;
+        }
+
+        [CmifCommand(12)]
+        public Result SetDefaultHomeButtonLongPressTime(long arg0)
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return Result.Success;
+        }
+
+        [CmifCommand(13)]
+        public Result UpdateDefaultDisplayResolution()
+        {
+            // Uses #omm cmd UpdateDefaultDisplayResolution
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return Result.Success;
+        }
+
+        [CmifCommand(14)]
+        public Result ShouldSleepOnBoot(out bool arg0)
+        {
+            arg0 = false;
+            // Uses #omm cmd ShouldSleepOnBoot
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return Result.Success;
+        }
+
+        [CmifCommand(15)]
+        public Result GetHdcpAuthenticationFailedEvent(out int arg0)
+        {
+            arg0 = 0;
+            // Uses #omm cmd GetHdcpAuthenticationFailedEvent
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return Result.Success;
+        }
+
+        [CmifCommand(30)]
+        public Result OpenCradleFirmwareUpdater(out ICradleFirmwareUpdater arg0)
+        {
+            arg0 = new CradleFirmwareUpdater();
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return Result.Success;
+        }
+    }
+}
diff --git a/src/Ryujinx.Horizon/Am/Ipc/Proxies/LibraryAppletProxy.cs b/src/Ryujinx.Horizon/Am/Ipc/Proxies/LibraryAppletProxy.cs
index 1dfe5a700..36bfcf563 100644
--- a/src/Ryujinx.Horizon/Am/Ipc/Proxies/LibraryAppletProxy.cs
+++ b/src/Ryujinx.Horizon/Am/Ipc/Proxies/LibraryAppletProxy.cs
@@ -87,9 +87,11 @@ namespace Ryujinx.Horizon.Am.Ipc.Proxies
         }
 
         [CmifCommand(23)]
-        public Result GetGlobalStateController()
+        public Result GetGlobalStateController(out IGlobalStateController globalStateController)
         {
-            throw new System.NotImplementedException();
+            globalStateController = new GlobalStateController();
+
+            return Result.Success;
         }
 
         [CmifCommand(1000)]
diff --git a/src/Ryujinx.Horizon/Am/Ipc/Storage/Storage.cs b/src/Ryujinx.Horizon/Am/Ipc/Storage/Storage.cs
index 8b475c2e6..c0fc66e7f 100644
--- a/src/Ryujinx.Horizon/Am/Ipc/Storage/Storage.cs
+++ b/src/Ryujinx.Horizon/Am/Ipc/Storage/Storage.cs
@@ -1,4 +1,3 @@
-using Ryujinx.Common.Logging;
 using Ryujinx.Horizon.Common;
 using Ryujinx.Horizon.Sdk.Am.Storage;
 using Ryujinx.Horizon.Sdk.Sf;
diff --git a/src/Ryujinx.Horizon/Am/Ipc/Storage/StorageChannel.cs b/src/Ryujinx.Horizon/Am/Ipc/Storage/StorageChannel.cs
index 2c9137aae..190a8ecdb 100644
--- a/src/Ryujinx.Horizon/Am/Ipc/Storage/StorageChannel.cs
+++ b/src/Ryujinx.Horizon/Am/Ipc/Storage/StorageChannel.cs
@@ -6,6 +6,7 @@ using System.Collections.Generic;
 
 namespace Ryujinx.Horizon.Am.Ipc.Storage
 {
+    // Might not be used outside of debug software
     partial class StorageChannel : IStorageChannel
     {
         private readonly Stack<IStorage> _storages;
diff --git a/src/Ryujinx.Horizon/Sdk/Am/AmResult.cs b/src/Ryujinx.Horizon/Sdk/Am/AmResult.cs
index 877dea9eb..5865e9fa8 100644
--- a/src/Ryujinx.Horizon/Sdk/Am/AmResult.cs
+++ b/src/Ryujinx.Horizon/Sdk/Am/AmResult.cs
@@ -23,5 +23,6 @@ namespace Ryujinx.Horizon.Sdk.Am
         public static Result StackPoolExhausted => new(Moduleld, 712);
         public static Result DebugModeNotEnabled => new(Moduleld, 974);
         public static Result DevFunctionNotEnabled => new(Moduleld, 980);
+        public static Result Stubbed => new(Moduleld, 999);
     }
 }
diff --git a/src/Ryujinx.Horizon/Sdk/Am/Controllers/IGlobalStateController.cs b/src/Ryujinx.Horizon/Sdk/Am/Controllers/IGlobalStateController.cs
new file mode 100644
index 000000000..a171c30ea
--- /dev/null
+++ b/src/Ryujinx.Horizon/Sdk/Am/Controllers/IGlobalStateController.cs
@@ -0,0 +1,22 @@
+using Ryujinx.Horizon.Common;
+using Ryujinx.Horizon.Sdk.Sf;
+
+namespace Ryujinx.Horizon.Sdk.Am.Controllers
+{
+    interface IGlobalStateController : IServiceObject
+    {
+        Result RequestToEnterSleep();
+        Result EnterSleep();
+        Result StartSleepSequence(bool arg0);
+        Result StartShutdownSequence();
+        Result StartRebootSequence();
+        Result IsAutoPowerDownRequested(out bool arg0);
+        Result LoadAndApplyIdlePolicySettings();
+        Result NotifyCecSettingsChanged();
+        Result SetDefaultHomeButtonLongPressTime(long arg0);
+        Result UpdateDefaultDisplayResolution();
+        Result ShouldSleepOnBoot(out bool arg0);
+        Result GetHdcpAuthenticationFailedEvent(out int arg0);
+        Result OpenCradleFirmwareUpdater(out ICradleFirmwareUpdater arg0);
+    }
+}
diff --git a/src/Ryujinx.Horizon/Sdk/Am/Proxies/ILibraryAppletProxy.cs b/src/Ryujinx.Horizon/Sdk/Am/Proxies/ILibraryAppletProxy.cs
index ffbb90acf..3220bf3de 100644
--- a/src/Ryujinx.Horizon/Sdk/Am/Proxies/ILibraryAppletProxy.cs
+++ b/src/Ryujinx.Horizon/Sdk/Am/Proxies/ILibraryAppletProxy.cs
@@ -16,7 +16,7 @@ namespace Ryujinx.Horizon.Sdk.Am.Proxies
         Result OpenLibraryAppletSelfAccessor(out ILibraryAppletSelfAccessor libraryAppletSelfAccessor);
         Result GetAppletCommonFunctions(out IAppletCommonFunctions appletCommonFunctions);
         Result GetHomeMenuFunctions();
-        Result GetGlobalStateController();
+        Result GetGlobalStateController(out IGlobalStateController globalStateController);
         Result GetDebugFunctions(out IDebugFunctions debugFunctions);
     }
 }