Ok so the Predator used in this VS is the Jungle Hunter.
The location is all of Westworld itself.
His foe, The Gunslinger.
The Gunslinger was an advanced android found in the Westworld theme park. He was programmed to start an argument and then persuade the tourist in fictitious gun draw. The Gunslinger inevitably looses the match every time because for the safety of the tourists the guns don't work on human beings but just on the androids. that all changed when a virus infected the park causing the androids to rouge.
The Gunslinger on the surface, looks like a tough cowboy, with a black hat covering his bald head. He wears a dark and pants covered by a black gun-belt with the holster on his right side. On closer inspection, the Gunslinger's eyes appear to have metallic-silver coloured pupils. With his facial cover removed, it is shown that he has a tube behind his mouth so that he can consume drinks without 'short circuiting'.
The Gunslinger at first is portrayed as an arrogant, whiskey-drinking bully who goads human guests into a gunfights with disparaging comments. Later in the film he becomes an emotionless and relentless machine who won't stop until his opponent is gunned down. On some level, he seems to enjoy killing humans - as shown when he kills John Blane in a duel and smirking at Peter when he challenges him next. It also seems he remembers every lost duel even before the malfunction.
Due to his nature as an android the Gunslinger is physically tougher, stronger and has faster reflexes then a human. He only ever lost in duels due to rigged nature of them. He was also upgraded with a number of features not found on other androids in the park. The Gunslinger possessed Thermal Vision which grants him enhanced vision in the dark and also allows him to track his targets footprints, however his eyes are vulnerable to acid which can destroy his normal vision and force him to really on his thermal vison. Also his thermal vison can be ineffective if an intense heat source is directly infront of his face such as a torch. The technicians increased his hearing sensitivity allowing him to better hear noises most human ears can't from certain distances. This was used when someone tried to ambush him, but The Gunslinger caught onto his vantage point by hearing him breathe. Also unlike some android in the park, the Gunslinger can consume liquids without short-circuiting.
His primary weapons are a Colt Single Action Army, Cavalry and a Winchester Model 1873. However he likely knows how to use any weapon in the park and there is no information that suggests he cannot make use of modern weapons should he find them in the staff areas of the park, although he may not be programed with how to fully operate them. In terms of physical combat he likely was programmed with knowledge of hand to hand combat an outlaw of the old west would have.
For weaknesses, his inner workings are likely still vulnerable to liquids if they bypass his outer layers, acid can breakdown his normal vision, intense heat can confuse his thermal vision and he can be set on fire.
