Not at all.
Quake, half life, and CS all put you in specific fictional scenarios where you fight fictional enemies. In GTA style games, you are in the city and exercise direct violence on the innocent people. I'm sure that stuff can be an incentive for some crack nuts, as a matter of fact I seem to remember a juvenile going a shotgun spree under the influence of GTA, but I'm not sure ... possibly in the US though where that kind of stuff is common anyway.