For this to work you'll need:
-https://www.gta5-hub.com/scripts/gang-and-turf-mod (original mod)
-Script Hook V
-Script Hook V Dot Net
-Native UI

Installation:
Just drop the file and replace the one located in gangModData folder.

About:

What this does is change the regular pedestrian enemies, for the original gangsters, triads and thugs that are in the game.
(keep in mind that you'll have to start over for this to take effect)
Includes:
-Fams;Ballas;Vagos;Lost MC;Varrios Aztecas;Marabunta; Armenian Mob,etc
-Triads
-Thugs
-Female gangs (Fams, Ballas, Vagos and Lost)
-Mafia
-Epsilon cult
-OG's
-Juggalos
-Mexthugs
-Jews
-Chemsec
-Blackops troops
-Dealers
-Robbers
-Prisoners

The gangs that spawn are random, so you can get any of those.

Note:
In some places, like mountains and isolated spaces, the enemies don't spawn, I don't know why. But it seemed to happen with the original version of the mod already.

All the credits of the mod goes to lucasvinbr for making it possible.
And don't forget to thank him for allowing me to upload this.

Have fun~ :3

Mods worth checking out:

https://www.gta5-hub.com/scripts/gangmod
https://pt.gta5-hub.com/scripts/gangwar-zip