There actually is a GUI for checking dom0 updates. In Qubes VM manager, select dom0 and click the update button in top toolbar. Or you can also use the context menu.
OTOH, in this case, the main benefit of the GUI are the notifications. The update process itself is usually more friendly from commandline. And you cannot install security-testing using GUI. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to email@example.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/17ef6cbe-00d4-45ac-93e2-3220d4c01e81%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.