Unfortunately I am using GNOME. Will kcron install / work in GNOME?
Depends .. if you're willing to install the base KDE packages .. sure it will work .. just try
# yum install kdeadmin
and see if you can live with the additional packages. If not, here's a document turned up through GOOGLE:
https://www.linux-magazine.com/issue/06/Crontab.pdf
Search URL: http://www.google.com/linux?hl=en&lr=&q=gTk+cron&btnG=Search
Maybe you'll find something you like there...
-M