GtkSysinfo is described as 'Perl-Gtk2 software for Linux which makes it possible to obtain a maximum of informations about the system such as temperature(with lm_sensors) , CPU frequency, hardware(with PciUtils) , network , ACPI and orther information' and is an app in the system & hardware category. There are more than 10 alternatives to GtkSysinfo for a variety of platforms, including Windows, Linux, Android, Mac and Flathub apps. The best GtkSysinfo alternative is CPU-Z, which is free. Other great apps like GtkSysinfo are HWiNFO (32/64), Speccy, Resources and Hardinfo.