added gigaset gs4 markdown

Change-Id: I3879f27a272bd99c400e5a7abdc45b77af9ec9a4
diff --git a/_config.yml b/_config.yml
index f457287..56a7ce0 100644
--- a/_config.yml
+++ b/_config.yml
@@ -68,6 +68,9 @@
   fairphone:
     output: true
 
+  gigaset:
+    output: true
+
   google:
     output: true