[LICENSE] Add SPDX Identifier
diff --git a/gds/gds2mag-all.sh b/gds/gds2mag-all.sh
index a7160b2..2f816a1 100755
--- a/gds/gds2mag-all.sh
+++ b/gds/gds2mag-all.sh
@@ -12,6 +12,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+# SPDX-License-Identifier: Apache-2.0