https://guix.gnu.org/blog/2020/gnu-guix-1.1.0-released/
I guess it depends on your definition of "GUI". :-)
https://i.stack.imgur.com/8OQdV.png
Intimated about text-installers but using something like Guix? Sound like a strange mindset.
Alpine's installer is the best IMO: you get a GUI style wizard but it's contained in a set of shell scripts (setup-*) so if you need it again you can run it yourself.
Edit: Also, I just want things to work these days. I'm not interested in learning some installer tool's commands that I'm never going to use again.
I am very comfortable on CLI, and will always prefer it over GUI for most tasks, but for OS installations, GUI is vastly superior. From the get go, if installer loads with GUI, you know that you likely won't see black screen on first boot. All the drives can be easily formatted (I always multi-boot) and there is no mental translation of how much space is used in which drive under what layout.
These 2 are my primary reasons. Apart from that, if something goes wrong during setup, GUI installer almost always comes with full browser available right there for looking IP errors, eliminating need for second device. With CLI installers, there usually isn't a DE included. (NixOS disk comes with full DE option, but CLI installer, making it a hybrid, not sure about GuixSD)
At work, with multiple machines with little difference, an experienced admin will just clone or fork a Git repository, format a full disk, and run the installation command.
Guix is amazing, all the awkwardness aside.