Is it possible ? What would you or do you go for? Have to admit I rarely wear anything other than jeans and t-shirt with a G-Shock. When smarter attire is necessary I normally break out one of my mechanical watches although have gone for the DW-5200 on occasion.
Hmmm, I'd think a GW-500 might be a touch fussy to be considered 'smart'. The GW-5000 might work. although to the untrained eye the premium nature would be lost given it looks near enough the same at a GW-M5600.
I normally stick with my m5600 models for smart situations but now and again I do wear some of my bigger and brighter G's - as long as I'm comfortable with it I'm not that fussed