If you're looking for additional mods, I highly recommend also checking out shitface's npc behavior and spawn mod. It really adds a lot to the open world with additional new npc and vehicle spawns, npc height variances, more aggressive npcs, and more. It's probably my favorite mod outside of the stuff I've released and integrates perfectly with GoS.
http://www.saintsrowmods.com/forum/index.php?threads/npc-behaviour-and-spawn-mod.766/
...or A new Enemy in Town, which adds a lot of new gangs to the game: http://www.saintsrowmods.com/forum/index.php?threads/a-new-enemy-in-town.2440/ (it's not compatible with NPC Behaviour, but it contains some of its functions).