"pole type building"
Are you talking about a fire watch tower type thing? (I have always day dreamed about having one...)
Or, like a large open Kazzebo type thing? Some pillars and a roof, no walls. I think thats what you're getting at? Figure it all NEMA 3 at the very least, for exposure to weather, and wet/damp location.
Then as for GFI's considering it is residential, all
Calling it an out building, or garage...
210(a)2 Garages, and also accessory buildings that have a floor located at or below grade level not intended as habitable rooms and limited to storage areas, work areas, and areas of similar use.
Same for commercial if it were:
511.12 Ground-Fault Circuit-Interrupter Protection for Personnel.
All 125-volt, single-phase, 15- and 20-ampere receptacles installed in areas where electrical diagnostic equipment, electrical hand tools, or portable lighting equipment are to be used shall have ground-fault circuit-interrupter protection for personnel.
Even if it doesn't fit a catagory, some common sense is in order in design, outside of the code. GFI all the 15 and 20A recepticals. Taking a knee on a concrete slab is like sticking your leg in tub while holding say a drill.... (CB's would be cheaper for this type of thing.) NEMA3 all around the wet areas at the very least, and cord covers if applicable in 406.8.