Green Palms is a large oil refinery located immediately west of Octane Springs in Bone County, San Andreas. It is comprised of large, slender smoke stacks and round storage tanks that are easily seen from the nearby tracks of the Brown Streak Railroad. To the west of Green Palms is the Lil' Probe'Inn, and to the southwest is the town of Fort Carson. Not very far to the north is Area 69.
There has been much speculation surrounding Green Palms after the The Truth, in a mission, says that "The only reason we have been in a cold war is because snake headed aliens run the oil industry"; however, this is most likely pure speculation. This may be a reference to the TV series The X-Files, where a sentient alien virus that looked a lot like oil could infiltrate human beings and take control of their bodies.