Well I don't have any GG1 pictures handy but I do have a memory. My Dad took me to the Army/Navy game in Philadelphia and we traveled via the PRR. I remember especially, after the game, we walked over to a yard area and there were all the trains waiting to take people home. GG1 after GG1 hooked to passenger cars with signs reading "New York", "Newark" , "Trenton"...etc. You picked out your train and got aboard. I later learned that the Army/Navy game was the largest passenger movement single day in the PRR calendar.
Well electrics...how about that famous "New Haven" type box cab. Here are a few: The Lionel 256 from 1924-1930.
The Lionel 253 from 1924-1932
The Lionel 520 from 1956-1957
Best Wishes
Don