PEAR_Frontend_Gtk2 is a PHP-Gtk2 based frontend for PEAR. It allows you to view, install and uninstall packages from different channels.
Since PEAR 1.4.6, you can start the program with pear -G if the package is installed.
The program requires the php-gtk extension that is not a PEAR/PECL package and can be obtained from http://gtk.php.net/.