For the icon to appear in the Menu, it is sometimes required to log out and log back in of KDE after the installation is complete, as you would do in case of RPMs. Also, it is strictly required to install the GRL packages through root account. Installing then in a regular user account may lead in a corrupt installation.
If you have installed it in any account other than root, then remove it with the granular -r command and then re-install it while logged into root.