Yes, London After Midnight is definitely a goth band because most of their albums belong to the Gothic Rock and Darkwave genres, which are among the core subgenres of goth music. Albums like Selected Scenes From The End Of The World, Psycho Magnet, and Oddities Too are examples of their goth sound.
Some of the other goth artists that are similar to them are Diva Destruction and Nosferatu.
London After Midnight is located in United States, active in 1990 — present. You can find more information about London After Midnight on their GothDB band page.