GNOME already comes with a CUPS configuration tool in gnome-control-center.

Index: system-config-printer.desktop.in
--- system-config-printer.desktop.in.orig
+++ system-config-printer.desktop.in
@@ -7,4 +7,5 @@ Exec=system-config-printer
 Terminal=false
 Type=Application
 Icon=printer
+NotShowIn=GNOME;
 StartupNotify=true