Is there a UFO in Grand Theft Auto?

Answer 1

Items like UFOs, and characters like Bigfoot, Leatherface, Jason Vorhees, aliens, etc. etc., do not appear in GTA San Andreas ordinary gameplay. They are myths. To produce anything like this would require a mod, available with the use of a computer. Best idea is to surf the net for availability of the mod you require, and also look at GTA dedicated websites like gtawiki and their modifications sections, to get further information.