The Glory Hole Theme Park is an amusement park in the GTA universe, presumably opened in 1985. It is advertised on the in-game radio in Grand Theft Auto: San Andreas and Grand Theft Auto: Liberty City Stories, and in Grand Theft Auto IV, it has its own accessible website, Gloryholethemepark.com.
The theme park seems family friendly, with a mascot named Larry Lion and his pride parade greeting young children at the gates on Main Street, the entrance of the theme park. The main attraction seems to be the Monster Woody Roller Coaster, constructed out of wood due to complaints about the other rides. The Flaming Scream machine was reopened during GTA IV as seen on the website, since an incident on the ride. Other rides and attractions noted were The Spitting Cobra, The Coffeegrinder, Bucking Bronco, Roman Shower, Log Flume and the Galley Wacker.
Rusty Brown's Ring Donuts are in league with the theme park, having their donuts in the food court along with Buttered Corn, Devil's Raisins and Yogurt Shot. The only noted shopping attraction is a shop named Kings and Queens, a unique store that features custom conceal kits, makeup and jewelry, hormones and wigs amongst other things not mentioned.
In Liberty City Stories, Head Radio holds a competition to win the chance to "visit San Andreas and the Glory Hole Theme Park", implying that the park in in the State of San Andreas, although GTA:SA shows no evidence of this (though it's possible the park relocated from another state to San Andreas in the period between the two games).
The names of rides and other attractions are laden with sex terminology. The name is a joke, as "glory hole" is the term for a hole in toilet stalls and adult arcade booths used for anonymous sexual activities, such as masturbation or oral sex. A hamster seems to be the main mascot, likely a reference to "gerbling", the practice of inserting small live animals (usually gerbils but also mice, hamsters, rats and various other rodents) into the human rectum to obtain stimulation. Most of the rollercoaster names are nicknames for a penis, if not other sexual puns.
In GTA V it makes a return, as seen in the Trailer.