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        xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9
                             http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">

  <!-- ==================== 1. HOMEPAGE ==================== -->
  <url>
    <loc>https://gs-portal.com/</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/" />
  </url>
  <url>
    <loc>https://gs-portal.com/?lang=en</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/" />
  </url>

  <!-- ==================== 2. ANATOMIC MAP ==================== -->
  <url>
    <loc>https://gs-portal.com/map</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/map" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/map?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/map" />
  </url>
  <url>
    <loc>https://gs-portal.com/map?lang=en</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/map" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/map?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/map" />
  </url>

  <!-- ==================== 3. ABDOMINAL PAIN DIAGNOSIS ==================== -->
  <url>
    <loc>https://gs-portal.com/pain</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/pain" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/pain?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/pain" />
  </url>
  <url>
    <loc>https://gs-portal.com/pain?lang=en</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/pain" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/pain?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/pain" />
  </url>

  <!-- ==================== 4. CLINICAL CALCULATORS ==================== -->
  <url>
    <loc>https://gs-portal.com/calculators</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/calculators" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/calculators?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/calculators" />
  </url>
  <url>
    <loc>https://gs-portal.com/calculators?lang=en</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/calculators" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/calculators?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/calculators" />
  </url>

  <!-- ==================== 5. EVALUATION & CLASSIFICATION ==================== -->
  <url>
    <loc>https://gs-portal.com/eval</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/eval" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/eval?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/eval" />
  </url>
  <url>
    <loc>https://gs-portal.com/eval?lang=en</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/eval" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/eval?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/eval" />
  </url>

  <!-- ==================== 6. SURGICAL ANTIBIOTICS ==================== -->
  <url>
    <loc>https://gs-portal.com/antibiotics</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/antibiotics" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/antibiotics?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/antibiotics" />
  </url>
  <url>
    <loc>https://gs-portal.com/antibiotics?lang=en</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/antibiotics" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/antibiotics?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/antibiotics" />
  </url>

  <!-- ==================== 7. STUDY MODE ==================== -->
  <url>
    <loc>https://gs-portal.com/study</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/study" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/study?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/study" />
  </url>
  <url>
    <loc>https://gs-portal.com/study?lang=en</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/study" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/study?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/study" />
  </url>

  <!-- ==================== 8. BOOKMARKS ==================== -->
  <url>
    <loc>https://gs-portal.com/bookmarks</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.6</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/bookmarks" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/bookmarks?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/bookmarks" />
  </url>
  <url>
    <loc>https://gs-portal.com/bookmarks?lang=en</loc>
    <lastmod>2026-08-08</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.5</priority>
    <xhtml:link rel="alternate" hreflang="ko" href="https://gs-portal.com/bookmarks" />
    <xhtml:link rel="alternate" hreflang="en" href="https://gs-portal.com/bookmarks?lang=en" />
    <xhtml:link rel="alternate" hreflang="x-default" href="https://gs-portal.com/bookmarks" />
  </url>

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