It is said to be located at the Bishop's WTF?! museum in Los Santos. According to the museum's poster all they know is that the creature is a "Half Cow, Half Snake" hybrid. The Cake is co-featured with another creature called the Eye-Fish, which is part of a "Freak Show" exhibit. The overall likelihood of the creature actually existing in the game is slim, as it may be just a publicity stunt of the museum.