GMA Islands support

core/constants.py

@@ -53,6 +53,12 @@ SIGS = [
         description="Islands on the Air",
         ref_regex=r"[A-Z]{2}\-\d{3}",
     ),
+    SIG(
+        name="GMA Island",
+        comment_names=[],
+        description="Global Mountain Activity - Islands",
+        ref_regex=r"(([A-Z]{2}\-\d{3})|([A-Z0-9]{1,3}\/[A-Z]{2}\-\d{3}))",
+    ),
     SIG(
         name="MOTA",
         comment_names=["MOTA"],