The MS-14C Gelgoog Cannon (ゲルググキャノン, Gerugugukyanon) is a variant of the MS-14A Gelgoog introduced in the original design series Mobile Suit Variation.

When the plans for the new MS-14 (formerly MS-11) Gelgoog were completed, twenty-five prototypes, under the designation YMS-14S (the Y in YMS-14S means it is a prototype Mobile Suit) were produced; twenty-four of the machines were given to the Chimera Corps. Of these twenty-four units, nine were configured into the MS-14B Gelgoog High Mobility Type while the rest were outfitted as Gelgoog Cannons. The Gelgoog Cannon is equipped with a specialized head unit and mounts a powerful beam cannon on a modified B-type backpack, and even with it, the suit's reactor is still powerful enough to support other weapons systems. This meant the Gelgoog Cannon could carry beam rifles and bazookas, or even swap out the forearm jet engines to mount other optional equipment. As the Gelgoog Cannon made use of the B-type's powerful backpack, it had enough thrust to keep itself maneuverable despite the added weaponry. The suit soon proved itself a capable fire-support and anti-fleet unit.