RGM-79R GM 2 [AUEG Colours] 

戦いは数だよ、兄貴！

tbf, the design wasn't that old during the Gryphs War even if most of them are just rebuilt GMs.

​@@dexexmachinatu4151yeah, the GM II was fine at what it was built to be: a serviceable cheap force multiplier that was very familiar to Federation mechanics and supply chains already due to it's shared parts with the first GM.

That's what I noticed. I guess they wanted to make things more immersive since they're fighting in space or in wide open land.

Where you can find any audovisual reference of the two?

@lolman-rw4ne not audio, but there are screenshots on their respective pages on the Gundam Wiki. Oh also, they appear in Zeta Gundam: A New Translation

​@YiminyCricket both the aeug gm only have a couple of seconds clips I think

大半はネモに置きかわったかジムⅢへの改修の為に後方おくりになったのでは？

@@ig-8866 様 仰るとおりジムⅡは後方に回ったのでしょうが、自分のコメは「ジムⅡの動画なのに中盤辺りであまり写ってなくね？」って主旨でした。分かりにくかったですよね_(._.)_

既にコメントされてる通りに多くがネモ等に置き換わってるので、画面の端にちょこっと映るシーンしか無くなってるだけで、ちゃんと存在はしている。