The last main GTA game outsold the COD game in that year. With the larger install bases COD game have been selling better in recent years, but even then they haven't had the legs that IV has. Also GTA IV is still charting today. Even MW3 doesn't chart anymore(in the UK. Don't know about the rest of the world but I assume it's similar). Also there's way more buzz around GTA V this year and yeah it's pretty much guaranteed to outsell Ghosts.