One scene in that horror movie is really gory.
That movie was too grotesque to watch.
彼はグロい話が好きだ。
He likes macabre stories.
I can't handle gore, so I can't watch this movie.
This video has a gore-warning tag on it.
グロ describes something disturbing or gory, whereas 可愛い describes something cute and appealing, the exact visual/emotional opposite (as combined in the slang グロ可愛い).
グロ (short for grotesque, meaning gory/macabre) and グロス (meaning a gross of 144 items, or a glossy finish) sound alike but are unrelated in meaning.
エロ (erotic) and グロ (grotesque/gory) are often paired as エロ・グロ in media discussion but describe completely different kinds of content.
grotesque but cute; creepy-cute
Clipped form of グロテスク, from English 'grotesque'.