diff --git a/nx/include/switch/services/hid.h b/nx/include/switch/services/hid.h
index b9257d06..711409b6 100644
--- a/nx/include/switch/services/hid.h
+++ b/nx/include/switch/services/hid.h
@@ -552,10 +552,11 @@ typedef enum {
     HidNpadLuciaType_U          = 3,    ///< U
 } HidNpadLuciaType;
 
-/// HidVibrationDeviceType
+/// Type values for HidVibrationDeviceInfo::type.
 typedef enum {
     HidVibrationDeviceType_Unknown                          = 0,     ///< Unknown
     HidVibrationDeviceType_LinearResonantActuator           = 1,     ///< LinearResonantActuator
+    HidVibrationDeviceType_GcErm                            = 2,     ///< GcErm (::HidNpadStyleTag_NpadGc)
 } HidVibrationDeviceType;
 
 /// VibrationDevicePosition
@@ -1581,6 +1582,7 @@ Result hidGetVibrationDeviceInfo(HidVibrationDeviceHandle handle, HidVibrationDe
 
 /**
  * @brief Sends the \ref HidVibrationDeviceHandle to the specified device.
+ * @note With ::HidVibrationDeviceType_GcErm, use \ref hidSendVibrationGcErmCommand instead.
  * @param[in] handle \ref HidVibrationDeviceHandle
  * @param[in] value \ref HidVibrationValue
  */
@@ -1588,6 +1590,7 @@ Result hidSendVibrationValue(HidVibrationDeviceHandle handle, const HidVibration
 
 /**
  * @brief Gets the current \ref HidVibrationValue for the specified device.
+ * @note With ::HidVibrationDeviceType_GcErm, use \ref hidGetActualVibrationGcErmCommand instead.
  * @param[in] handle \ref HidVibrationDeviceHandle
  * @param[out] out \ref HidVibrationValue
  */
@@ -1607,12 +1610,29 @@ Result hidIsVibrationPermitted(bool *flag);
 
 /**
  * @brief Send vibration values[index] to handles[index].
+ * @note With ::HidVibrationDeviceType_GcErm, use \ref hidSendVibrationGcErmCommand instead.
  * @param[in] handles Input array of \ref HidVibrationDeviceHandle.
  * @param[in] values Input array of \ref HidVibrationValue.
  * @param[in] count Total entries in the handles/values arrays.
  */
 Result hidSendVibrationValues(const HidVibrationDeviceHandle *handles, const HidVibrationValue *values, s32 count);
 
+/**
+ * @brief Send \ref HidVibrationGcErmCommand to the specified device, for ::HidVibrationDeviceType_GcErm.
+ * @note Only available on [4.0.0+].
+ * @param[in] handle \ref HidVibrationDeviceHandle
+ * @param[in] cmd \ref HidVibrationGcErmCommand
+ */
+Result hidSendVibrationGcErmCommand(HidVibrationDeviceHandle handle, HidVibrationGcErmCommand cmd);
+
+/**
+ * @brief Get \ref HidVibrationGcErmCommand for the specified device, for ::HidVibrationDeviceType_GcErm.
+ * @note Only available on [4.0.0+].
+ * @param[in] handle \ref HidVibrationDeviceHandle
+ * @param[out] out \ref HidVibrationGcErmCommand
+ */
+Result hidGetActualVibrationGcErmCommand(HidVibrationDeviceHandle handle, HidVibrationGcErmCommand *out);
+
 /**
  * @brief Gets whether vibration is available with the specified device.
  * @note Only available on [7.0.0+].
diff --git a/nx/source/services/hid.c b/nx/source/services/hid.c
index d06f2fab..59457192 100644
--- a/nx/source/services/hid.c
+++ b/nx/source/services/hid.c
@@ -1260,8 +1260,9 @@ Result hidSendVibrationValue(HidVibrationDeviceHandle handle, const HidVibration
 Result hidGetActualVibrationValue(HidVibrationDeviceHandle handle, HidVibrationValue *out) {
     const struct {
         HidVibrationDeviceHandle handle;
+        u32 pad;
         u64 AppletResourceUserId;
-    } in = { handle, appletGetAppletResourceUserId() };
+    } in = { handle, 0, appletGetAppletResourceUserId() };
 
     return serviceDispatchInOut(&g_hidSrv, 202, in, *out,
         .in_send_pid = true,
@@ -1291,6 +1292,40 @@ Result hidSendVibrationValues(const HidVibrationDeviceHandle *handles, const Hid
     );
 }
 
+Result hidSendVibrationGcErmCommand(HidVibrationDeviceHandle handle, HidVibrationGcErmCommand cmd) {
+    if (hosversionBefore(4,0,0))
+        return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);
+
+    const struct {
+        HidVibrationDeviceHandle handle;
+        u32 pad;
+        u64 AppletResourceUserId;
+        u64 cmd;
+    } in = { handle, 0, appletGetAppletResourceUserId(), cmd };
+
+    return serviceDispatchIn(&g_hidSrv, 207, in,
+        .in_send_pid = true,
+    );
+}
+
+Result hidGetActualVibrationGcErmCommand(HidVibrationDeviceHandle handle, HidVibrationGcErmCommand *out) {
+    if (hosversionBefore(4,0,0))
+        return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);
+
+    const struct {
+        HidVibrationDeviceHandle handle;
+        u32 pad;
+        u64 AppletResourceUserId;
+    } in = { handle, 0, appletGetAppletResourceUserId() };
+
+    u64 tmp=0;
+    Result rc = serviceDispatchInOut(&g_hidSrv, 208, in, tmp,
+        .in_send_pid = true,
+    );
+    if (R_SUCCEEDED(rc) && out) *out = tmp;
+    return rc;
+}
+
 Result hidIsVibrationDeviceMounted(HidVibrationDeviceHandle handle, bool *flag) {
     if (hosversionBefore(7,0,0))
         return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);
@@ -1299,8 +1334,9 @@ Result hidIsVibrationDeviceMounted(HidVibrationDeviceHandle handle, bool *flag)
 
     const struct {
         HidVibrationDeviceHandle handle;
+        u32 pad;
         u64 AppletResourceUserId;
-    } in = { handle, appletGetAppletResourceUserId() };
+    } in = { handle, 0, appletGetAppletResourceUserId() };
 
     u8 tmp=0;
     rc = serviceDispatchInOut(&g_hidSrv, 211, in, tmp,