This article offers an overview of the technological advancements in traditional Korean music instruments, also known as Gugak. The projects detailed in this article show how sensors, physical controls, alternative designs and materials, and software development can be used to enhance performance options and adapt to modern performance settings and needs. Although there are fewer Gugak NIME projects and research available compared to Western instruments, this genre has the potential to inspire various areas of ongoing research, such as specialised signal processing, sensor applications, and interactive educational platforms. This paper is also the first review article that summarises the current state of technological advances and applications specifically for Gugak instruments and musical genres.