ci: run GB300 nightly suite in the standard Nvidia nightly workflow (#28536)

Co-authored-by: Baizhou Zhang <sobereddiezhang@gmail.com>
Co-authored-by: Mohammad Miadh Angkad <176301910+mmangkad@users.noreply.github.com>

.github/workflows/nightly-test-nvidia.yml

@@ -24,6 +24,7 @@ on:
           - 'nightly-test-perf-4-gpu-b200'
           - 'nightly-test-perf-8-gpu-b200'
           - 'nightly-test-specialized-8-gpu-b200'
+          - 'nightly-test-perf-4-gpu-gb300'
           - 'nightly-test-kernel-1-gpu-h100'
           - 'nightly-test-diffusion-comparison'
           - 'nightly-test-kernel-8-gpu-h200'
@@ -512,6 +513,31 @@ jobs:
       - uses: ./.github/actions/upload-cuda-coredumps
         if: failure()
 
+  # GB300 (Grace-Blackwell NVL4) performance tests - 4 GPU (ARM64)
+  nightly-test-perf-4-gpu-gb300:
+    if: github.repository == 'sgl-project/sglang' && (inputs.job_filter == '' || inputs.job_filter == 'all' || inputs.job_filter == 'nightly-test-perf-4-gpu-gb300')
+    runs-on: 4-gpu-gb300
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.ref || github.ref }}
+
+      - uses: ./.github/actions/check-maintenance
+
+      - name: Install dependencies
+        run: |
+          bash scripts/ci/cuda/ci_install_dependency.sh
+
+      - name: Run test
+        timeout-minutes: 600
+        run: |
+          cd test
+          python3 run_suite.py --hw cuda --suite nightly-4-gpu-gb300 --nightly --continue-on-error --timeout-per-file 7200
+
+      - uses: ./.github/actions/upload-cuda-coredumps
+        if: failure()
+
   # Specialized B200 tests - 8 GPU, for specific backends and configs
   nightly-test-specialized-8-gpu-b200:
     if: github.repository == 'sgl-project/sglang' && (inputs.job_filter == '' || inputs.job_filter == 'all' || inputs.job_filter == 'nightly-test-perf-8-gpu-b200' || inputs.job_filter == 'nightly-test-specialized-8-gpu-b200')
@@ -695,6 +721,7 @@ jobs:
       - nightly-test-vlm-perf-2-gpu-h100
       - nightly-test-perf-4-gpu-b200
       - nightly-test-specialized-8-gpu-b200
+      - nightly-test-perf-4-gpu-gb300
       - nightly-test-diffusion-comparison
       - nightly-test-precision-8-gpu-h200
       - consolidate-metrics