What upcoming film is this?

It appears to be a rather eerie film about a black family. The preview showed very quiet, gray scenes. One was of a boy in a red shirt petting his dog, another was of a screaming woman near a car, and another was of another boy standing in a field full of crows. The films name was a single word that started with the letter 'G' and appears to have not been released yet. I can't find it on Wikipedia.