diff --git a/frontend/src/i18n/locales/en.ts b/frontend/src/i18n/locales/en.ts
index d9c535453e..3b70bb1e90 100644
--- a/frontend/src/i18n/locales/en.ts
+++ b/frontend/src/i18n/locales/en.ts
@@ -3974,7 +3974,9 @@ export default {
           authorizeHint: 'Get Refresh Token via OAuth2',
           oauthFieldsRequired: 'Please fill in Client ID and Client Secret first',
           oauthSuccess: 'Google Drive authorization successful',
-          oauthFailed: 'Google Drive authorization failed'
+          oauthFailed: 'Google Drive authorization failed',
+          closeWindow: 'This window will close automatically',
+          processing: 'Processing authorization...'
         }
       },
       streamTimeout: {
diff --git a/frontend/src/i18n/locales/zh.ts b/frontend/src/i18n/locales/zh.ts
index 8023666af6..a2ec660f70 100644
--- a/frontend/src/i18n/locales/zh.ts
+++ b/frontend/src/i18n/locales/zh.ts
@@ -4134,7 +4134,9 @@ export default {
           authorizeHint: '通过 OAuth2 获取 Refresh Token',
           oauthFieldsRequired: '请先填写 Client ID 和 Client Secret',
           oauthSuccess: 'Google Drive 授权成功',
-          oauthFailed: 'Google Drive 授权失败'
+          oauthFailed: 'Google Drive 授权失败',
+          closeWindow: '此窗口将自动关闭',
+          processing: '正在处理授权...'
         }
       },
       streamTimeout: {
diff --git a/frontend/src/router/index.ts b/frontend/src/router/index.ts
index d235de517e..d8d17550c7 100644
--- a/frontend/src/router/index.ts
+++ b/frontend/src/router/index.ts
@@ -225,6 +225,17 @@ const routes: RouteRecordRaw[] = [
     }
   },
 
+  // ==================== Admin OAuth Callback Routes ====================
+  {
+    path: '/admin/gdrive-oauth-callback',
+    name: 'GDriveOAuthCallback',
+    component: () => import('@/views/admin/GDriveOAuthCallbackView.vue'),
+    meta: {
+      requiresAuth: false,
+      title: 'Google Drive OAuth'
+    }
+  },
+
   // ==================== Admin Routes ====================
   {
     path: '/admin',
diff --git a/frontend/src/views/admin/GDriveOAuthCallbackView.vue b/frontend/src/views/admin/GDriveOAuthCallbackView.vue
new file mode 100644
index 0000000000..f8f41c1fd6
--- /dev/null
+++ b/frontend/src/views/admin/GDriveOAuthCallbackView.vue
@@ -0,0 +1,71 @@
+<template>
+  <div class="flex min-h-screen items-center justify-center bg-gray-50 px-4 dark:bg-dark-900">
+    <div class="w-full max-w-md text-center">
+      <div v-if="error" class="card p-8">
+        <div class="mx-auto mb-4 flex h-12 w-12 items-center justify-center rounded-full bg-red-100 dark:bg-red-900/30">
+          <svg class="h-6 w-6 text-red-600 dark:text-red-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
+          </svg>
+        </div>
+        <h2 class="text-lg font-semibold text-gray-900 dark:text-white">{{ t('admin.settings.soraS3.gdrive.oauthFailed') }}</h2>
+        <p class="mt-2 text-sm text-gray-500 dark:text-gray-400">{{ error }}</p>
+        <p class="mt-4 text-xs text-gray-400 dark:text-gray-500">{{ t('admin.settings.soraS3.gdrive.closeWindow') }}</p>
+      </div>
+      <div v-else-if="sent" class="card p-8">
+        <div class="mx-auto mb-4 flex h-12 w-12 items-center justify-center rounded-full bg-green-100 dark:bg-green-900/30">
+          <svg class="h-6 w-6 text-green-600 dark:text-green-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7" />
+          </svg>
+        </div>
+        <h2 class="text-lg font-semibold text-gray-900 dark:text-white">{{ t('admin.settings.soraS3.gdrive.oauthSuccess') }}</h2>
+        <p class="mt-2 text-sm text-gray-500 dark:text-gray-400">{{ t('admin.settings.soraS3.gdrive.closeWindow') }}</p>
+      </div>
+      <div v-else class="card p-8">
+        <div class="mx-auto mb-4 h-8 w-8 animate-spin rounded-full border-4 border-gray-200 border-t-blue-500"></div>
+        <p class="text-sm text-gray-500 dark:text-gray-400">{{ t('admin.settings.soraS3.gdrive.processing') }}</p>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, onMounted } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { useRoute } from 'vue-router'
+
+const route = useRoute()
+const { t } = useI18n()
+
+const error = ref('')
+const sent = ref(false)
+
+onMounted(() => {
+  const code = route.query.code as string
+  const state = route.query.state as string
+  const errorParam = route.query.error as string
+  const errorDesc = route.query.error_description as string
+
+  if (errorParam) {
+    error.value = errorDesc || errorParam
+    return
+  }
+
+  if (!code) {
+    error.value = 'No authorization code received'
+    return
+  }
+
+  // Send code back to opener window via postMessage
+  if (window.opener) {
+    window.opener.postMessage(
+      { type: 'gdrive_oauth_callback', code, state },
+      window.location.origin
+    )
+    sent.value = true
+    // Auto-close after a short delay
+    setTimeout(() => window.close(), 1500)
+  } else {
+    error.value = 'Cannot communicate with the parent window. Please close this window and try again.'
+  }
+})
+</script>