The Nintendo 64 version, "Gex 64: Enter the Gecko", contains an extra level not found in the Playstation version: "Gecques Cousteau". However, the Nintendo 64 version lacks the Playstation levels "Poltergex", "Texas Chainsaw Manicure", and "Lava Dabba Doo".
The first Gex game available for Nintendo 64 and Game Boy Color.
The last Gex game made for the PC.
The game's humor was inspired by "The Simpsons."
In the Japanese version, Gex's name is changed to Reno.