Same as the title need a really small ISO recommendations which has a GUI as i have really bad network speeds here where i am in my college and need it to create XAMPP/DNS/BIND9 servers dont mind the base (debian/arch) anything works!!!
AntiX core is only 660Mb but it doesn’t have a gui. AntiX full is about 2.2Gb and has four guis.
I would use Debian for that application anyway.
I would not use any kind of Arch base for that application.
The debian netinstall ISO is ~750MB