No, Secret Stairways is not a goth artist, because they play Dungeon Synth, while goth music consists of Gothic Rock and its derived genres, like Deathrock, Darkwave, Ethereal Wave, and Coldwave.

However, their music does show some goth influences and could be considered adjacent to the goth scene.

It is important to note that while this artist is not goth, they did make goth music as part of acts like Twelfth Of Never.

If you want to dive into the goth music scene, some of the bands that might appeal to you if you enjoy Secret Stairways are Dead Can Dance, Lycia, and The Frozen Autumn.