The plush will be available in two versions (Smilin' and Toothy) and two sizes (4" and 8"). They are currently listed as "Coming Soon" in the Bigshot Toyworks store with prices of $8 and $16, depending on size.
If you're not familiar with the game or the character, here are details from the Chronic Logic website:"Gish isn't your average hero; in fact, he's not your average anything... See, Gish is a ball of tar. A Sunday stroll with his lady friend Brea goes awry when a shadowy figure emerges from an open manhole and pulls Brea into the ground below. Following Brea's calls for help, Gish suddenly finds himself in the subterranean sewers of Dross, a long forgotten city filled with twisting corridors, evil traps and some of the most demented creatures imaginable."