Устанавливаем Gnome

pacman -S gnome gnome-extra gdm

pacman -S gnome-tweak-tool

GTK3 theme via settings.ini

Variable $XDG_CONFIG_HOME is usually set to ~/.config

${XDG_CONFIG_HOME}/gtk-3.0/settings.ini
[Settings]
gtk-theme-name = Adwaita
gtk-fallback-icon-theme = gnome
# next option is applicable only if selected theme supports it
gtk-application-prefer-dark-theme = true
# set font name and dimension
gtk-font-name = Sans 10

gsettings set org.gnome.nautilus.preferences always-use-location-entry true

gsettings set org.gnome.shell.clock show-date true

Подробнее

Установщик пакетов

pacman