diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..4c09a44
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "tgs"]
+	path = tgs
+	url = https://gitlab.com/mattia.basaglia/tgs.git
diff --git a/tgs b/tgs
new file mode 160000
index 0000000..7d1b68a
--- /dev/null
+++ b/tgs
@@ -0,0 +1 @@
+Subproject commit 7d1b68a8dfd3da39e2b4d9d2b8beba28d1894a20