A user on Reddit called HardHandle has posted a short clip of their GTA V character using a makeshift skateboard to move down the street. Although there is no official skateboard feature, this player has found a cart that you can use to achieve roughly the same effect.
He also provided a map of the location, so other users can find it. So far, however, no one has found a way to use a skateboard in GTA Online.
GRAND THEFT AUTO NEWS
The enthusiastic response has made one thing very clear. Fans really want skateboards in GTA V. Who knows, maybe Rockstar will catch wind of this and add some skateboarding DLC. If such a thing should occur, rest assured that we’ll let you know immediately.