In GTA III, K-JAH is run by Jamaican DJ, Horace "The Pacifist" Walsh. Playing dub on the station, he makes commentary between and during songs about the conflict going on in Liberty City, encouraging citizens to be peaceful and listen to Dub. He will also comment on the SPANK problem in Liberty City, saying things such as "Iman say: there's too much SPANK buisness a gwaan" or giving shout outs to the Yardies telling them "To stay off the SPANK, my brethren". It is also one of the few stations not owned by Love Media, the mega-corporation owned by Donald Love, as seen from Horace's line, "Mi have no love fi Donald Love, mon". This may explain why the radio doesn't have commercials.
In GTA San Andreas, a West Coast counterpart of K-JAH station, K-JAH West, appears. There is a reference by K-JAH West DJ to Liberty City, in lines: "...from Liberty City to San Andreas".
During the development of GTA Advance, K-JAH was one of the three radio stations that was originally suppose to appear in the game (along with MSX FM and Lips 106), but was dropped. However, a billboard with the stations logo appears in Bedford Point near the Ammu-Nation, along with the slogan "Reggae to rock". It is located near the territory of the Yakuza in Liberty City.
Also in GTA Liberty City Stories, the DJ gives a shoutout to K-JAH West saying, "this goes out to me Brethren on the West Coast", and eventually goes on commenting on K-JAH West's DJ Johnny Lawton.
It might even be owned by the Yardies, as Horrace Walsh says "let no man trouble with this business, this business is Yardie business".
K-JAH West DJs Marshall Peters and Johnny Lawton refer to Liberty City's K-JAH as K-JAH East, as the station is broadcasted on the east coast. However, neither Horace Walsh or Natalie Walsh Davis in GTA III and GTA Liberty City Stories, respectively, refer to the station as so. It could be possible that K-JAH West had ceased broadcasting by the time of the events of GTA Liberty City Stories.