The mod corrects the territories of the gangs, making them more relevant for the final stage of the development of the game, replaces the weapons of the groups (usually with what they have in the story) It also adds two new groups: bikers and the Russian mafia. There are also more minor changes: 1) Added two GSF members from the cutscenes to the GSF gangster list, now there are 5 of them. 2) Chance of conflict between police and African American/Hispanic gangs increased. 3) For most factions, the number of cars has been slightly increased by adding those that are characteristic of them in the story.
All changes in gangster zones are due to something. For example, the plot of the game or the accumulation of graffiti of certain gangs, as is the case in many areas of Los Santos. Most of the standard districts are not affected by the mod, so if you have them occupied by GSF you will not have to capture them all again (however, there are exceptions).