diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index 2eb89df..6c711cf 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -330,6 +330,17 @@
     "title": "Auth Files Management",
     "title_section": "Auth Files",
     "description": "Manage all CLI Proxy JSON auth files here (e.g. Qwen, Gemini, Vertex). Uploading a credential immediately enables the corresponding AI integration.",
+    "migrate_button": "Import from external?",
+    "migrate_title": "External Migration",
+    "migrate_subtitle": "gcli2api",
+    "migrate_email_label": "Email",
+    "migrate_email_placeholder": "Enter email to generate the credential",
+    "migrate_email_hint": "Used for the email field and the file name",
+    "migrate_email_required": "Enter an email first",
+    "migrate_upload_button": "Antigrvity Credential",
+    "migrate_parse_error": "Unable to parse credential file",
+    "migrate_missing_fields": "Credential missing required fields: {{fields}}",
+    "migrate_success": "Migration complete. Credential uploaded.",
     "upload_button": "Upload File",
     "delete_all_button": "Delete All",
     "empty_title": "No Auth Files",
diff --git a/src/i18n/locales/zh-CN.json b/src/i18n/locales/zh-CN.json
index 7848504..2f20b26 100644
--- a/src/i18n/locales/zh-CN.json
+++ b/src/i18n/locales/zh-CN.json
@@ -330,6 +330,17 @@
     "title": "认证文件管理",
     "title_section": "认证文件",
     "description": "这里集中管理 CLI Proxy 支持的所有 JSON 认证文件（如 Qwen、Gemini、Vertex 等），上传后即可在运行时启用相应的 AI 服务。",
+    "migrate_button": "从外部迁移？",
+    "migrate_title": "外部迁移",
+    "migrate_subtitle": "gcli2api",
+    "migrate_email_label": "邮箱",
+    "migrate_email_placeholder": "输入邮箱用于生成认证文件",
+    "migrate_email_hint": "该邮箱将写入凭证并生成文件名",
+    "migrate_email_required": "请先填写邮箱",
+    "migrate_upload_button": "Antigrvity凭证",
+    "migrate_parse_error": "无法解析凭证文件",
+    "migrate_missing_fields": "凭证缺少必要字段: {{fields}}",
+    "migrate_success": "迁移完成，凭证已上传",
     "upload_button": "上传文件",
     "delete_all_button": "删除全部",
     "empty_title": "暂无认证文件",
diff --git a/src/pages/AuthFilesPage.module.scss b/src/pages/AuthFilesPage.module.scss
index 8a48dc3..3eaf844 100644
--- a/src/pages/AuthFilesPage.module.scss
+++ b/src/pages/AuthFilesPage.module.scss
@@ -32,6 +32,23 @@
   flex-wrap: wrap;
 }
 
+.migrationContent {
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-md;
+
+  :global(.form-group) {
+    margin: 0;
+  }
+}
+
+.migrationSubtitle {
+  font-size: 12px;
+  font-weight: 600;
+  color: var(--text-tertiary);
+  letter-spacing: 0.08em;
+}
+
 .titleWrapper {
   display: flex;
   align-items: center;
diff --git a/src/pages/AuthFilesPage.tsx b/src/pages/AuthFilesPage.tsx
index adb3341..e21b15c 100644
--- a/src/pages/AuthFilesPage.tsx
+++ b/src/pages/AuthFilesPage.tsx
@@ -83,6 +83,7 @@ const OAUTH_PROVIDER_EXCLUDES = new Set(['all', 'unknown', 'empty']);
 const MIN_CARD_PAGE_SIZE = 3;
 const MAX_CARD_PAGE_SIZE = 30;
 const MAX_AUTH_FILE_SIZE = 50 * 1024;
+const MIGRATION_EXPIRES_IN = 3599;
 
 const clampCardPageSize = (value: number) =>
   Math.min(MAX_CARD_PAGE_SIZE, Math.max(MIN_CARD_PAGE_SIZE, Math.round(value)));
@@ -178,6 +179,10 @@ export function AuthFilesPage() {
   const [deletingAll, setDeletingAll] = useState(false);
   const [keyStats, setKeyStats] = useState<KeyStats>({ bySource: {}, byAuthIndex: {} });
   const [usageDetails, setUsageDetails] = useState<UsageDetail[]>([]);
+
+  const [migrationModalOpen, setMigrationModalOpen] = useState(false);
+  const [migrationEmail, setMigrationEmail] = useState('');
+  const [migrationUploading, setMigrationUploading] = useState(false);
 
   // 详情弹窗相关
   const [detailModalOpen, setDetailModalOpen] = useState(false);
@@ -209,6 +214,7 @@ export function AuthFilesPage() {
   const [savingMappings, setSavingMappings] = useState(false);
 
   const fileInputRef = useRef<HTMLInputElement | null>(null);
+  const migrationFileInputRef = useRef<HTMLInputElement | null>(null);
   const loadingKeyStatsRef = useRef(false);
   const excludedUnsupportedRef = useRef(false);
   const mappingsUnsupportedRef = useRef(false);
@@ -425,9 +431,13 @@ export function AuthFilesPage() {
   const handleUploadClick = () => {
     fileInputRef.current?.click();
   };
+
+  const handleMigrationFilePick = () => {
+    migrationFileInputRef.current?.click();
+  };
 
   // 处理文件上传（支持多选）
-  const handleFileChange = async (event: React.ChangeEvent<HTMLInputElement>) => {
+  const handleFileChange = async (event: React.ChangeEvent<HTMLInputElement>) => {
     const fileList = event.target.files;
     if (!fileList || fileList.length === 0) return;
 
@@ -490,8 +500,102 @@ export function AuthFilesPage() {
     }
 
     setUploading(false);
-    event.target.value = '';
-  };
+    event.target.value = '';
+  };
+
+  const handleMigrationFileChange = async (event: React.ChangeEvent<HTMLInputElement>) => {
+    const file = event.target.files?.[0];
+    if (!file) return;
+
+    const trimmedEmail = migrationEmail.trim();
+    if (!trimmedEmail) {
+      showNotification(t('auth_files.migrate_email_required'), 'warning');
+      event.target.value = '';
+      return;
+    }
+
+    if (!file.name.endsWith('.json')) {
+      showNotification(t('auth_files.upload_error_json'), 'error');
+      event.target.value = '';
+      return;
+    }
+
+    if (file.size > MAX_AUTH_FILE_SIZE) {
+      showNotification(
+        t('auth_files.upload_error_size', { maxSize: formatFileSize(MAX_AUTH_FILE_SIZE) }),
+        'error'
+      );
+      event.target.value = '';
+      return;
+    }
+
+    setMigrationUploading(true);
+    try {
+      const raw = await file.text();
+      let payloadSource: Record<string, unknown> | null = null;
+      try {
+        const parsed = JSON.parse(raw);
+        if (parsed && typeof parsed === 'object' && !Array.isArray(parsed)) {
+          payloadSource = parsed as Record<string, unknown>;
+        }
+      } catch {
+        payloadSource = null;
+      }
+
+      if (!payloadSource) {
+        showNotification(t('auth_files.migrate_parse_error'), 'error');
+        return;
+      }
+
+      const token = typeof payloadSource.token === 'string' ? payloadSource.token : '';
+      const refreshToken =
+        typeof payloadSource.refresh_token === 'string' ? payloadSource.refresh_token : '';
+      const projectId = typeof payloadSource.project_id === 'string' ? payloadSource.project_id : '';
+      const expiry = typeof payloadSource.expiry === 'string' ? payloadSource.expiry : '';
+
+      const missingFields: string[] = [];
+      if (!token) missingFields.push('token');
+      if (!expiry) missingFields.push('expiry');
+      if (!refreshToken) missingFields.push('refresh_token');
+      if (!projectId) missingFields.push('project_id');
+
+      if (missingFields.length > 0) {
+        showNotification(
+          t('auth_files.migrate_missing_fields', { fields: missingFields.join(', ') }),
+          'error'
+        );
+        return;
+      }
+
+      const migratedPayload = {
+        access_token: token,
+        email: trimmedEmail,
+        expired: expiry,
+        expires_in: MIGRATION_EXPIRES_IN,
+        project_id: projectId,
+        refresh_token: refreshToken,
+        timestamp: Date.now(),
+        type: 'antigravity'
+      };
+
+      const fileName = `antigravity-${trimmedEmail.replace(/@/g, '_')}.json`;
+      const migratedFile = new File([JSON.stringify(migratedPayload)], fileName, {
+        type: 'application/json'
+      });
+
+      await authFilesApi.upload(migratedFile);
+      showNotification(t('auth_files.migrate_success'), 'success');
+      await loadFiles();
+      await loadKeyStats();
+      setMigrationModalOpen(false);
+    } catch (err: unknown) {
+      const errorMessage = err instanceof Error ? err.message : '';
+      showNotification(`${t('notification.upload_failed')}: ${errorMessage}`, 'error');
+    } finally {
+      setMigrationUploading(false);
+      event.target.value = '';
+    }
+  };
 
   // 删除单个文件
   const handleDelete = async (name: string) => {
@@ -1015,6 +1119,14 @@ export function AuthFilesPage() {
         title={titleNode}
         extra={
           <div className={styles.headerActions}>
+            <Button
+              variant="secondary"
+              size="sm"
+              onClick={() => setMigrationModalOpen(true)}
+              disabled={disableControls}
+            >
+              {t('auth_files.migrate_button')}
+            </Button>
             <Button
               variant="secondary"
               size="sm"
@@ -1035,10 +1147,10 @@ export function AuthFilesPage() {
             <Button size="sm" onClick={handleUploadClick} disabled={disableControls || uploading} loading={uploading}>
               {t('auth_files.upload_button')}
             </Button>
-            <input
-              ref={fileInputRef}
-              type="file"
-              accept=".json,application/json"
+            <input
+              ref={fileInputRef}
+              type="file"
+              accept=".json,application/json"
               multiple
               style={{ display: 'none' }}
               onChange={handleFileChange}
@@ -1117,9 +1229,48 @@ export function AuthFilesPage() {
               {t('auth_files.pagination_next')}
             </Button>
           </div>
-        )}
+        )}
       </Card>
 
+      <Modal
+        open={migrationModalOpen}
+        onClose={() => setMigrationModalOpen(false)}
+        title={t('auth_files.migrate_title')}
+        footer={
+          <Button variant="secondary" onClick={() => setMigrationModalOpen(false)} disabled={migrationUploading}>
+            {t('common.close')}
+          </Button>
+        }
+      >
+        <div className={styles.migrationContent}>
+          <div className={styles.migrationSubtitle}>{t('auth_files.migrate_subtitle')}</div>
+          <Input
+            label={t('auth_files.migrate_email_label')}
+            hint={t('auth_files.migrate_email_hint')}
+            placeholder={t('auth_files.migrate_email_placeholder')}
+            value={migrationEmail}
+            onChange={(e) => setMigrationEmail(e.target.value)}
+            disabled={migrationUploading}
+          />
+          <Button
+            variant="secondary"
+            fullWidth
+            onClick={handleMigrationFilePick}
+            disabled={disableControls || migrationUploading}
+            loading={migrationUploading}
+          >
+            {t('auth_files.migrate_upload_button')}
+          </Button>
+          <input
+            ref={migrationFileInputRef}
+            type="file"
+            accept=".json,application/json"
+            style={{ display: 'none' }}
+            onChange={handleMigrationFileChange}
+          />
+        </div>
+      </Modal>
+
       {/* OAuth 排除列表卡片 */}
       <Card
         title={t('oauth_excluded.title')}