Acronymic
Nice acronym, GK121 ... Pity that it's a total misfit. The A400(M) is assembled in Spain from components made in Germany, France, the UK and Spain, of course. It's a European product, designed to serve European armed forces, and later for service with countries whose needs have outgrown the capability of the C-130 and can also operate from strips the C-17 cannot.
As far as "naming" it goes, why not follow the example of airlines worldwide who happily fly 737s, 747s, A320s? Simple, really, and it saves time wasted in discussion of non-essential and also the costs of those whose misfortune it is to suggest such things. The A400 will no doubt get a nickname from its users, but the Airships in their mental stratosphere don't like what the "lower ranks" might get up to - after all, it might be "rude" !
Could vent more spleen, but won't !