This is the 6587th most frequent Russian word.
gtk
The term "gtk" does not exist as a standard Russian word. It may be a typo, abbreviation, or acronym.
Here, 'GTK' is used as a proper noun, referring to a specific library used in software development.
GTK — это графический тулкит для создания интерфейсов.
GTK is a graphical toolkit for creating interfaces.
In this case, 'GTK' again references the toolkit and places it within the context of a software development process.
В разработке этого приложения использован GTK.
In the development of this application, GTK was used.
Here, 'GTK' is referred to in a broader sense as a tool considered beneficial for developers.