Consortium: Candarous Tanks (a few squads blow it up in seconds)
M.A.L. (not that good but it works)
Empire: Turbolaser Towers (just too much firepower for it to handle)
Dark Trooper Phase III (deployed) (1 shot, 1 hardpoint down)
hope this helps those who have trouble with the gargantuan raids
The only problem being that both Turbolasers and DT3 aren't exactly plentiful in an Imperial arsenal...
See also
http://www.lucasforums.com/showthread.php?t=173294)
The Imperials should get the AT-XT or something. Those proton mortars would be good aganist the Gargantuan's shields and would be useful for other thing too.
Mass driver turrets eat Garm for breakfast too. The Empire really get shafted against Garm because you have to have specialised units to combat him or you are screwed.
If the AI is controling the Garm, I used plain citizens to kill him. I massed a bunch onto him, he use his special ability which drains his shields, then a backup contigent of citizens ran up and fired on his exposed shield hard point. Rinse and repeat. No more Garm. Works on a human player if you can goud him into using the special ability. Especailly near a Turret.
its Very easy to Destroy Garm for Imperials
2 DT3 or a Mass amount of AT-sts
Zann : Cuddles