diff --git a/extensions/gbcc.zip b/extensions/gbcc.zip
new file mode 100644
index 0000000..ca08f6c
Binary files /dev/null and b/extensions/gbcc.zip differ
diff --git a/libraries.conf b/libraries.conf
index 552a6c3..fd106af 100644
--- a/libraries.conf
+++ b/libraries.conf
@@ -142,6 +142,15 @@ At creation, the user has to define the structure of the fact base, that means d
     homepage: "https://github.com/luis-r-izquierdo/netlogo-fuzzy-logic-extension#readme"
     downloadURL: "https://raw.githubusercontent.com/NetLogo/NetLogo-Libraries/6.1/extensions/fuzzy-2.0.zip"
   }
+  {
+    name: "gbcc"
+    codeName: "gbcc"
+    shortDescription: "Syntax stubs for primitives in the Group-based Cloud Computing project"
+    longDescription: "This extension allows one to use NetLogo software to develop GbCC models.  Graph (graph:), Maps (maps:), and Physics (physics:) extensions also exist."
+    version: "1.0"
+    homepage: "https://github.com/cbradyatinquire/gbcc-extension"
+    downloadURL: "https://raw.githubusercontent.com/NetLogo/NetLogo-Libraries/6.1/extensions/gbcc-1.0.zip"
+  }
   {
     name: "GIS"
     codeName: "gis"