yochananmarqos [1] filed a request to merge gnome-system-monitor-gtk3 [2] into gnome-system-monitor-linuxmint [3]:
Duplicate package. [1] https://aur.archlinux.org/account/yochananmarqos/ [2] https://aur.archlinux.org/pkgbase/gnome-system-monitor-gtk3/ [3] https://aur.archlinux.org/pkgbase/gnome-system-monitor-linuxmint/