From Grand Theft Wiki
The notion of pornography is featured throughout the GTA series but explicit pornography is never displayed in the games.
- In Grand Theft Auto: Vice City, there is a pornographic film company (InterGlobal Studios) on Prawn Island, run by Steve Scott. Several missions involve working for Steve, including meeting porn star Candy Suxxx.
- In Grand Theft Auto IV, Joseph Kaplan runs a pornography website and shop. Niko Bellic and Dimitri Rascalov go to meet Joseph, who has not paid his protection money.
- There are a number of sex shops in GTA IV and Grand Theft Auto: San Andreas, some of which can be entered. There are enterable shops in Hove Beach, Star Junction and on the Las Venturas strip.