Não é um gui, mas o yum-cron fará o que você quiser, eu acho
yum install yum-cron
A configuração padrão segue e alterando apply-updates para yes deve fazer o que você quiser
/etc/yum/yum-cron.conf
# What kind of update to use:
# default = yum upgrade
# security = yum --security upgrade
# security-severity:Critical = yum --sec-severity=Critical upgrade
# minimal = yum --bugfix upgrade-minimal
# minimal-security = yum --security upgrade-minimal
# minimal-security-severity:Critical = --sec-severity=Critical upgrade-minimal
update_cmd = default
# Whether a message should be emitted when updates are available,
# were downloaded, or applied.
update_messages = yes
# Whether updates should be downloaded when they are available.
download_updates = yes
# Whether updates should be applied when they are available. Note
# that download_updates must also be yes for the update to be applied.
apply_updates = no
# Maximum amount of time to randomly sleep, in minutes. The program
# will sleep for a random amount of time between 0 and random_sleep
# minutes before running. This is useful for e.g. staggering the
# times that multiple systems will access update servers. If
# random_sleep is 0 or negative, the program will run immediately.
# 6*60 = 360
random_sleep = 360