The dubbed versions call him Gold Roger while the subtitled episodes spell it as Gol D. Roger. In the subtitle version it is similar to Monkey D. Luffy but does this mean that Luffy's name is Monkeyd or Gold Rogers name is Gol?
This guy got it. It is Gol D. Not Gold but the world gov covered up his name to cover up the will of dIts Gol D. Roger, but to cover up the D. the world goverment called him Gold Roger.