SMG-IInd's name is derived from Super MechaGodzilla. The "IInd" part of its name most likely means "second," making its full name "Super MechaGodzilla The Second".
SMG-IInd looks like a very thin Super MechaGodzilla. Its head and neck strongly resemble Mecha-King Ghidorah's mechanical head, and the Garuda II is built into SMG-IInd's spherical shoulders. Its arms have built-in miniguns which fire rapidly, and its chest and torso are much smaller than any MechaGodzilla's. SMG-IInd's legs are very bulky, and its feet have four toes. Its tail resembles that of the Showa MechaGodzilla's.
SMG-IInd is powered by a laser nuclear fusion reactor, and is protected by the Heat-resistant Alloy NT-I coated with artificial diamond. It is equipped with a laser cutter, double maser cannons, plasma shell, plasma cannon and wire claw attack much like the G-Force mechs before it. SMG-IInd is also equipped with an anti-beam force field. It travels at 330 kilometers per hour. It's automatic control, so it doesn't have a crew inside of it.