From the Metal Gear Wiki

Metal Gear GANDER is the result of the U.S. Army's "Project Babel" after the U.S. Government procured the data from the original prototype in Outer Heaven. It is stolen by the Gindra Liberation Front and taken to their fortress of Galuade (the former Outer Heaven).

[edit] Overview

GANDER's armament consists of two nuclear warhead-launching rail guns (similar to Metal Gear REX), two vulcan cannons, six guided missile pods, two automated flying attack pods, a pair of spread fire cannons, and a close range flamethrower. Its most powerful weapon is its satellite-based data link system that allows it to launch nuclear missiles anywhere in the world. This system consumes too much power and requires an entire power plant to function properly.

[edit] Behind the scenes

GANDER's design is based on one of Yoji Shinkawa's unused Metal Gear REX concepts.

The head on Metal Gear GANDER is also seen as the head of the later Metal Gear Chaioth Ha Qadesh which is seen in Metal Gear Acid 2

Metal Gears
Main Series
Shagohod — Metal Gear RAXA — Metal Gear TX-55 — Metal Gear D — Metal Gear REX Metal Gear RAY — Arsenal Gear — Metal Gear Gekko — Metal Gear Mk. II
Non-Canon Metal Gears
Metal Gear Chaioth Ha Qadesh — Metal Gear GANDER — Metal Gear KODOQUE