I was converting some HISS tanks into Shad Hyenas** by unleashing the Red Shadow assimilator (red can of spray paint). So I got to the point of putting on the details, and tried to work out the logic behind the markings. I'm a bit stumped, maybe a few people care, and of those very few, some fraction might have some ideas.
(**There is a meta issue here- Do the Red Shadows actually have more then one Hyena? Or is this a one of a kind prototype that the Cobra later mass produce?)
Anyway, what do the the large vehicle markings mean? Anyone have any theories? I trolled through the stories I could think of with Shadow vehicles. The Hyena always has the marking (translated of course)
GKH (I assume that last character is an H? right?), as does the toy (although the toy possibly reads xGKH). For example:
Shadowtraks however, sometimes have no markings , or are marked GK  or are marked KG . This might not be an artist peculiarity as two different shadowtraks have different markings on the same page . The toy is marked GK.
both GK and KG
Additionally there are ships, and landing craft seen marked G  and KG , while a battlecruiser is also marked G . Finally, a banner draped at headquarters is marked G  also.
battlecruiser marked G
headquarters with G flag
So G seems really important, and KG and GK often turn up, while the Hyena is always GKH. Any ideas? There are too few to be vehicle identification numbers, and vehicles sometimes have the same marking side by side. Right now I might guess maybe these are unit or division insignia. Anyone know what G stands for or the logic of these other markings?
Probably I shall just go get my coat then.
(well it was this or grade papers)