Has the GG1 been delayed?
I remember seeing an article in a magazine about 45 years ago on how to modify an Arnold N-scale GG1 into a Milwaukee Road Bi-polar electric.
It involved kitbashing the center cab section out of a caboose, and forming the end hoods from sheet plastic draped over a metal tube with a heating element inside.
With some "junk box" detailing, it looked pretty good!
I'm sure the same thing could be done with the new Bachmann GG1.
Les