Tested with a clean garrysmod

Mode: SP & MP = Singleplayer, Multiplayer
Mods: nothing
Map: dev_sdk_gmod
Cheats: on
Activated content: CSS, DOD, HL2, HL2 DM, HL2 EP1 & EP2, HL2 LC, TF2



Common errors on loadup a map in SP.
KeyValues Error: RecursiveLoadFromBuffer: got EOF instead of keyname in file materials/models/krazy/gtav/weapons/lighter.vmt
VertexLitGeneric,

Common errors on loadup a map in MP.
Couldn't include file 'weapons\advanced_rifle\extras.lua' (File not found) (@lua/weapons/advanced_rifle/shared.lua (line 315))
Couldn't include file 'weapons\gtav_knife\extras.lua' (File not found) (@lua/weapons/antiquecavalrydagger/shared.lua (line 49))
Couldn't include file 'weapons\ap_pistol\extras.lua' (File not found) (@lua/weapons/ap_pistol/shared.lua (line 308))
Couldn't include file 'weapons\assault_rifle_mk2\extras.lua' (File not found) (@lua/weapons/assault_rifle_mk2/shared.lua (line 347))
Couldn't include file 'weapons\assault_shotgun\extras.lua' (File not found) (@lua/weapons/assault_shotgun/shared.lua (line 311))
Couldn't include file 'weapons\assault_smg\extras.lua' (File not found) (@lua/weapons/assault_smg/shared.lua (line 313))
Couldn't include file 'weapons\bullpup_rifle\extras.lua' (File not found) (@lua/weapons/bullpup_rifle/shared.lua (line 321))
Couldn't include file 'weapons\assault_rifle_mk2\extras.lua' (File not found) (@lua/weapons/bullpup_rifle_mk2/shared.lua (line 345))
Couldn't include file 'weapons\bullpup_shotgun\extras.lua' (File not found) (@lua/weapons/bullpup_shotgun/shared.lua (line 312))
Couldn't include file 'weapons\carbine_rifle_mk2\extras.lua' (File not found) (@lua/weapons/carbine_rifle_mk2/shared.lua (line 342))
Couldn't include file 'weapons\ceramicpistol\extras.lua' (File not found) (@lua/weapons/ceramicpistol/shared.lua (line 307))
Couldn't include file 'weapons\combat_mg\extras.lua' (File not found) (@lua/weapons/combat_mg/shared.lua (line 314))
Couldn't include file 'weapons\combat_mg_mk2\extras.lua' (File not found) (@lua/weapons/combat_mg_mk2/shared.lua (line 341))
Couldn't include file 'weapons\combat_pdw\extras.lua' (File not found) (@lua/weapons/combat_pdw/shared.lua (line 315))
Couldn't include file 'weapons\combat_pistol\extras.lua' (File not found) (@lua/weapons/combat_pistol/shared.lua (line 311))
Couldn't include file 'weapons\compact_grenade_launcher\extras.lua' (File not found) (@lua/weapons/compact_grenade_launcher/shared.lua (line 316))
Couldn't include file 'weapons\compact_rifle\extras.lua' (File not found) (@lua/weapons/compact_rifle/shared.lua (line 301))
Couldn't include file 'weapons\doubleactionrevolver\extras.lua' (File not found) (@lua/weapons/doubleactionrevolver/shared.lua (line 304))
Couldn't include file 'weapons\firework_launcher\extras.lua' (File not found) (@lua/weapons/firework_launcher/shared.lua (line 356))
Couldn't include file 'weapons\gtav_assault_rifle\extras.lua' (File not found) (@lua/weapons/gtav_assault_rifle/shared.lua (line 317))
Couldn't include file 'weapons\gtav_baseballbat\extras.lua' (File not found) (@lua/weapons/gtav_baseballbat/shared.lua (line 51))
Couldn't include file 'weapons\gtav_battleaxe\extras.lua' (File not found) (@lua/weapons/gtav_battleaxe/shared.lua (line 50))
Couldn't include file 'weapons\gtav_carbine_rifle\extras.lua' (File not found) (@lua/weapons/gtav_carbine_rifle/shared.lua (line 324))
Couldn't include file 'weapons\gtav_baseballbat\extras.lua' (File not found) (@lua/weapons/gtav_club/shared.lua (line 51))
Couldn't include file 'weapons\gtav_crowbar\extras.lua' (File not found) (@lua/weapons/gtav_crowbar/shared.lua (line 51))
Couldn't include file 'weapons\gtav_doublebarrel_shotgun\extras.lua' (File not found) (@lua/weapons/gtav_doublebarrel_shotgun/shared.lua (line 297))
Couldn't include file 'weapons\gtav_flare_gun\extras.lua' (File not found) (@lua/weapons/gtav_flare_gun/shared.lua (line 409))
Couldn't include file 'weapons\gtav_flashlight\extras.lua' (File not found) (@lua/weapons/gtav_flashlight/shared.lua (line 54))
Couldn't include file 'weapons\gtav_grenade_launcher\extras.lua' (File not found) (@lua/weapons/gtav_grenade_launcher/shared.lua (line 327))
Couldn't include file 'weapons\gtav_hatchet\extras.lua' (File not found) (@lua/weapons/gtav_hammer/shared.lua (line 50))
Couldn't include file 'weapons\gtav_hatchet\extras.lua' (File not found) (@lua/weapons/gtav_hatchet/shared.lua (line 50))
Couldn't include file 'weapons\gtav_knife\extras.lua' (File not found) (@lua/weapons/gtav_knife/shared.lua (line 49))
Couldn't include file 'weapons\gtav_machete\extras.lua' (File not found) (@lua/weapons/gtav_machete/shared.lua (line 50))
Couldn't include file 'weapons\gtav_mg\extras.lua' (File not found) (@lua/weapons/gtav_mg/shared.lua (line 307))
Couldn't include file 'weapons\gtav_minigun\extras.lua' (File not found) (@lua/weapons/gtav_minigun/shared.lua (line 387))
Couldn't include file 'weapons\gtav_musket\extras.lua' (File not found) (@lua/weapons/gtav_musket/shared.lua (line 303))
Couldn't include file 'weapons\gtav_nightstick\extras.lua' (File not found) (@lua/weapons/gtav_nightstick/shared.lua (line 51))
Couldn't include file 'weapons\gtav_pistol\extras.lua' (File not found) (@lua/weapons/gtav_pistol/shared.lua (line 310))
Couldn't include file 'weapons\gtav_railgun\extras.lua' (File not found) (@lua/weapons/gtav_railgun/shared.lua (line 422))
Couldn't include file 'weapons\gtav_smg\extras.lua' (File not found) (@lua/weapons/gtav_smg/shared.lua (line 313))
Couldn't include file 'weapons\gtav_sniperrifle\extras.lua' (File not found) (@lua/weapons/gtav_sniperrifle/shared.lua (line 322))
Couldn't include file 'autorun\server\hatchet_invincibility.lua' (File not found) (@lua/weapons/gtav_stonehatchet/shared.lua (line 1))
Couldn't include file 'weapons\gtav_stonehatchet\extras.lua' (File not found) (@lua/weapons/gtav_stonehatchet/shared.lua (line 52))
Couldn't include file 'weapons\gtav_knife\extras.lua' (File not found) (@lua/weapons/gtav_switchblade/shared.lua (line 53))
Couldn't include file 'weapons\gusenberg_sweeper\extras.lua' (File not found) (@lua/weapons/gusenberg_sweeper/shared.lua (line 306))
Couldn't include file 'weapons\heavy_pistol\extras.lua' (File not found) (@lua/weapons/heavy_pistol/shared.lua (line 312))
Couldn't include file 'weapons\heavy_revolver\extras.lua' (File not found) (@lua/weapons/heavy_revolver/shared.lua (line 305))
Couldn't include file 'weapons\heavy_revolver_mk2\extras.lua' (File not found) (@lua/weapons/heavy_revolver_mk2/shared.lua (line 318))
Couldn't include file 'weapons\heavy_shotgun\extras.lua' (File not found) (@lua/weapons/heavy_shotgun/shared.lua (line 315))
Couldn't include file 'weapons\heavy_sniper\extras.lua' (File not found) (@lua/weapons/heavy_sniper/shared.lua (line 313))
Couldn't include file 'weapons\heavy_sniper_mk2\extras.lua' (File not found) (@lua/weapons/heavy_sniper_mk2/shared.lua (line 327))
Couldn't include file 'weapons\gtav_knife\extras.lua' (File not found) (@lua/weapons/knuckle_dusters/shared.lua (line 53))
Couldn't include file 'weapons\machine_pistol\extras.lua' (File not found) (@lua/weapons/machine_pistol/shared.lua (line 308))
Couldn't include file 'weapons\marksman_pistol\extras.lua' (File not found) (@lua/weapons/marksman_pistol/shared.lua (line 304))
Couldn't include file 'weapons\marksman_rifle\extras.lua' (File not found) (@lua/weapons/marksman_rifle/shared.lua (line 317))
Couldn't include file 'weapons\marksman_rifle_mk2\extras.lua' (File not found) (@lua/weapons/marksman_rifle_mk2/shared.lua (line 338))
Couldn't include file 'weapons\micro_smg\extras.lua' (File not found) (@lua/weapons/micro_smg/shared.lua (line 313))
Couldn't include file 'weapons\mini_smg\extras.lua' (File not found) (@lua/weapons/mini_smg/shared.lua (line 307))
Couldn't include file 'weapons\navy_revolver\extras.lua' (File not found) (@lua/weapons/navy_revolver/shared.lua (line 304))
Couldn't include file 'weapons\pipewrench\extras.lua' (File not found) (@lua/weapons/pipewrench/shared.lua (line 51))
Couldn't include file 'weapons\pistol50\extras.lua' (File not found) (@lua/weapons/pistol50/shared.lua (line 309))
Couldn't include file 'weapons\pistol_mk2\extras.lua' (File not found) (@lua/weapons/pistol_mk2/shared.lua (line 320))
Couldn't include file 'weapons\pool_cue\extras.lua' (File not found) (@lua/weapons/pool_cue/shared.lua (line 51))
Couldn't include file 'weapons\pump_shotgun\extras.lua' (File not found) (@lua/weapons/pump_shotgun/shared.lua (line 307))
Couldn't include file 'weapons\pump_shotgun_mk2\extras.lua' (File not found) (@lua/weapons/pump_shotgun_mk2/shared.lua (line 326))
Couldn't include file 'weapons\rocket_propelled_grenade\extras.lua' (File not found) (@lua/weapons/rocket_propelled_grenade/shared.lua (line 354))
Couldn't include file 'weapons\sawedoff_shotgun\extras.lua' (File not found) (@lua/weapons/sawedoff_shotgun/shared.lua (line 300))
Couldn't include file 'weapons\smg_mk2\extras.lua' (File not found) (@lua/weapons/smg_mk2/shared.lua (line 350))
Couldn't include file 'weapons\sns_pistol\extras.lua' (File not found) (@lua/weapons/sns_pistol/shared.lua (line 303))
Couldn't include file 'weapons\sns_pistol_mk2\extras.lua' (File not found) (@lua/weapons/sns_pistol_mk2/shared.lua (line 315))
Couldn't include file 'weapons\special_carbine\extras.lua' (File not found) (@lua/weapons/special_carbine/shared.lua (line 317))
Couldn't include file 'weapons\special_carbine_mk2\extras.lua' (File not found) (@lua/weapons/special_carbine_mk2/shared.lua (line 340))
Couldn't include file 'weapons\sweeper_shotgun\extras.lua' (File not found) (@lua/weapons/sweeper_shotgun/shared.lua (line 297))
Couldn't include file 'weapons\vintage_pistol\extras.lua' (File not found) (@lua/weapons/vintage_pistol/shared.lua (line 308))


The entities -> "ent_rpgrocket_airstrike", "ent_gtav_firework", "ent_proximitymine", "ent_stickybomb", "ent_rpgrocket", makes some trouble on explode.
ENTITY[NUMBER]: Changing collision rules within a callback is likely to cause crashes!

If a "gtav_grenade_launcher" projectile hits the ground your dev-console show this error.
Failed to load sound "gta5\small_explosion_1.wav", file probably missing from disk/repository
Failed to load sound "gta5\small_explosion_2.wav", file probably missing from disk/repository

If you pickup "gtav_molotovcocktail" your dev-console show this error.
Attemped to precache unknown particle system "nmrih_molotov_rag_fire"!

If you spawn "sticky_bomb" with a toolgun your dev-console show you this error.
material models/krazy/gtav/weapons/stickybomb has a normal map and an envmapmask. Must use $normalmapalphaenvmapmask.
material models/krazy/gtav/weapons/stickybombhud has a normal map and an envmapmask. Must use $normalmapalphaenvmapmask.

If you spawn "up_n_atomizer" with a toolgun your dev-console show you this error.
Error! Variable "$envmaptint" is multiply defined in material "models/krazy/gtav/weapons/upnatomizer_gold"!
Error! Variable "$envmaptint" is multiply defined in material "models/krazy/gtav/weapons/upnatomizer_platinum"!

If you spawn "vintage_pistol" with a toolgun your dev-console show you this error.
Error! Variable "$envmaptint" is multiply defined in material "models/krazy/gtav/weapons/vintagepistol_gold"!
Error! Variable "$envmaptint" is multiply defined in material "models/krazy/gtav/weapons/vintagepistol_platinum"!

If you spawn "gtav_jerrycan" with a toolgun and pickup the item your dev console show you a lua error.
[[TFA] GTA V: The Complete Weapons Pack] lua/weapons/tfa_gtav_gascan_base/shared.lua:87: Tried to use a NULL entity!
1. StopSound - [C]:-1
2. unknown - lua/weapons/tfa_gtav_gascan_base/shared.lua:87

"gtav_stungun" removed the weapon of a default hl2 npc. & create a lua error on npcs that doesnt have a ragdoll as example hl1 npcs
[[TFA] GTA V: The Complete Weapons Pack] lua/weapons/gtav_stungun/shared.lua:421: Tried to use a NULL physics object!
1. SetVelocity - [C]:-1
2. taseNPC - lua/weapons/gtav_stungun/shared.lua:421
3. unknown - lua/weapons/gtav_stungun/shared.lua:313
*** ERROR: C_ServerRagdoll::InitModel: models/w_squeak2.mdl missing vcollide data *** <- example npc

If you disconnect with the weapons below your dev-console show you this lua errors.
[[TFA] GTA V: The Complete Weapons Pack] lua/weapons/homing_launcher/shared.lua:440: Tried to use a NULL entity!
1. StopSound - [C]:-1
2. unknown - lua/weapons/homing_launcher/shared.lua:440
[[TFA] GTA V: The Complete Weapons Pack] lua/weapons/tfa_gtav_gascan_base/shared.lua:87: Tried to use a NULL entity!
1. StopSound - [C]:-1
2. unknown - lua/weapons/tfa_gtav_gascan_base/shared.lua:87
[[TFA] GTA V: The Complete Weapons Pack] lua/weapons/gtav_minigun/shared.lua:270: Tried to use a NULL entity!
1. StopSound - [C]:-1
2. unknown - lua/weapons/gtav_minigun/shared.lua:270
[[TFA] GTA V: The Complete Weapons Pack] lua/weapons/widowmaker/shared.lua:271: Tried to use a NULL entity!
1. StopSound - [C]:-1
2. unknown - lua/weapons/widowmaker/shared.lua:271

If you use "heavy_sniper_mk2" the first time your dev-console show this error.
Requesting texture value from var "$basetexture" which is not a texture value (material: tfa_rtmaterial)


SUGGESTIONS
May change "gtav_grenade_launcher"'s animation from AR2 too Shotgun.
May increase the firerate from every pistol at least a bit.
Make the weapons AI compatible.