Hi,
gbox is not on our feeds, most probably it doesn't go on background automatically. Add -b on start-stop-daemon.
Code:
exec start-stop-daemon -S -b -x /usr/bin/gbox
Code:
-b, --background
Typically used with programs that don't detach on their own.
This option will force start-stop-daemon to fork before starting
the process, and force it into the background. WARNING:
start-stop-daemon cannot check the exit status if the process
fails to execute for any reason. This is a last resort, and is
only meant for programs that either make no sense forking on
their own, or where it's not feasible to add the code for them
to do this themselves.