LibGTop is a library to get system specific data such as CPU and Memory Usage and information about running Processes.
On Systems like Solaris or Digital Unix where you need special privileges to get those data, it uses a setuid/setgid server to do so.
Even if LibGTop is a part of the GNOME desktop environment, the main interface of LibGTop is totally independent from any particular desktop environment, so you can also use it as a standalone library in any piece of GPLed software.
These details are provided for information only. No information here is legal advice and should not be used as such.