First of all, Guan Shanyue is neither a epigraph nor a style. What is Yuefu Poetry? Yuefu is the official music of Han Dynasty, and Guan Shanyue is nothing more than a theme of Yuefu official music. Taking "Guan Shanyue" as the theme is the feeling of parting. Because official music is widely sung, later poets also use this topic when writing poems. Later, with the new Yuefu movement, there was an old topic of innovation. This is a feeling of long-term cultural formation. For example, people can think of the sadness of parting when they see the pavilion folding willows.
Generally, Yuefu poems can be accompanied by music, so there are also Guan Shanyue's ancient songs.
Finally, regarding painting, China has been connected with poetry and painting since ancient times, so there are also paintings with this theme.
As for whether the landlord thinks it is a concept with "Gothic style", I think there are some similarities here, but the scope of Gothic is obviously larger. Gothic is a style involving many fields for centuries, and this style even has many variations (such as death). It is not only a simple theme of poetry and painting, but also a symbol of the European cultural era.