The last time Garrod used the Satellite System with the original GX is a CMOA for several people the least of whom Jamil who: Soon after waking from a coma comes up with a plan that has Garrod use the Satellite System, instead of blowing up half the terrain around them Garrod dodges the Microwave ray milliseconds before it was set to charge his Wave Motion Gun evaporating the Lake he was hovering over and creating sufficient cover to allow the Freeden to escape.
Garrod defeating Carris with the X Divider. Granted, he had observed Jamil Neate in action, but to see a Newtype be defeated by a non-Newtype with only courage, hard work and guts on his side is an awesome moment in and of itself.
Even the construction of the X Divider is itself a Crowning Moment Of Awesome. What can you say about Kid Salsamille stabbing himself in the leg with a goddamn screwdriver just so he can stay awake and finish working on the Gundam X's repairs?
Not only that, Jamil shooting down Carris' Funnels. He is still suffering from PTSD. His cockpit phobia isn't fully treated. He hasn't piloted a mobile suit in fifteen years. And Jamil flies out and owns Carris, shooting down his Funnels. Jamil Neate doesn't need Newtype powers: he's just that damn good.
Everything that Tiffa Addil and Lucille Lilliant did together in the climax of the Sea of Lorelei arc. Especially on behalf of Lucille, who did her share comatose and locked in a capsule, and using Tiffa as a Soul Jar..
Jamil Neate owning a literal horde of grunts with the X Divider, GX Bits and Lucille Lilliant's assistance in using the Flash System.
When Garrod and Katokk are invading the New UNE ship to steal the Double X, some of the soldiers toss a grenade at them. Katokk just says "You threw that too early!" and kicks the grenade back at them to blow up in their faces.
The first time Garrod uses the Double X. He uses the head vulcans to repel enemy soldiers, scoops up Jamil, Tiffa, and Katokk's body, and flies them to the Freeden. Then, when he sees a squadron of Balients closing in, and with a yell of "I won't let you do it!", Garrod flies into their midst head-on. Keep in mind that the Double X's armament at the time was a set of head vulcans, a pair of chest vulcans, and a pair of beam sabers. He takes down Every. Single. Mech. Singlehandedly.
In the episode when everyone's trying to hold off the Federation so Garrod can go into space, the numerous Heroic Sacrifices, albeit nonfatal ones, which hits its pinnacle with the Cool Ship Freeden ramming an enemy vessel when all seemed lost. This troper can't remember who said it, but someone said a simple phrase which perfectly captured the spirit of the moment and how loyal and determined everyone was.
To expand on this: Garrod pulls a reverse version of Hostage For Macguffin by demanding that the villains return his kidnapped love interest or else he'll use his Wave Motion Gun on theirWave Motion Gun. They refuse to believe that he has said legendary weapon in his possession... so he fires a warning shot. With a Wave Motion Gun. After the villains stop freaking out, they realize that the weapon is incapable of rapid fire, so Garrod has wasted his shot. Garrod responds by firing a second warning shot (since he was actually in an upgraded version that was capable of rapid fire). The villains freak out again and eventually decide to just give up their hostage and let Garrod have his way. As soon as his love interest is safely back with him, Garrod says the above quote and blows the enemy's Wave Motion Gun up anyway. Good times.
Also, Garrod is outside of visual range of his targets. He is firing from extreme range, without ever seeing his targets, relying on the targeting data Palla's sending him. He's so far away there is actual travel time for his blasts. And he puts his blasts right where he wants them. For a kid with no formal schooling to be able to work out the necessary math and planning, that's impressive.
That and making the ending concise, coherent, and in tune with the series' optimistic tone as a whole. Give it up for the writing staff.
Episode 24. Sara, Tonya and Kid are in a shootout with the New UNE forces, and the New UNE brings in an IFV mounted with a heavy machine gun. Looks like it's all over...until Ennil El comes in with her own IFV mounted with a cannon. Hilarious and awesome at the same time.
The moment in Episode 9 where the Gundam X walks on water in the middle of an inferno.
And is topped when he deliberately causes the microwave to misfire and flash boils the lake.