GUI for package manager is fairly useless IMO. Homebrew is CLI only AFAIK and nobody cares, apt has aptitude but I've seen nobody use it in real life. Honestly only relevant package manager GUI I see are Play Store/App Store, and that's a different discussion.
Linux has a few app store style GUIs, e.g., Discover and the GNOME Software Center.
Btw, aptitude includes an ncurses TUI, but it's also an improved CLI frontend for apt that includes a few really nice features. Check it out next time you're on a Debian-based distro and try some of the special search patterns at least.
