Do gravity waves have a polarity?

[Sermil]

Light waves do, I think sound waves don't, I'm sort of imagining that gravity waves don't, but does anybody know of a proof?

Gravity waves or gravitational waves?

According to Wikipedia, gravitational waves have a polarity, but only over a range from 0 to 90° (unlike light, which can be polarized in a range of directions from 0 to 180°).

However, gravity waves such as ocean waves do not, I believe, have a polarity. It's not like ocean waves can vibrate in any direction except up and down, right?