I still have my old GW box in the attic, been a lonnnnnng time. ;-) Sounds like the GW sheet would benefit from having a tab for players, and at least one other tab for NPC/Monsters. Especially if the statblock for NPC/Monsters are different than the PC's. I would say create a tabbed layout, share whatever attributes you can, then create new ones that are unique to NPC/monsters. This is nice since you can use the sheet for both PC's and Monsters. Sheet rolls for attacks and abilities and such. Not familiar with the sheet, so I'm not sure what it can/cannot do currently... Otherwise, you could just include your monster's statblock and info in the journal's bio and gm notes and manually refer to them for encounters.