To spawn Portal 1 and 2 props in Garry's Mod, you need to have the Portal content mounted. First, ensure that you have the Portal or Portal 2 game installed and linked to your Garry's Mod. Then, open the spawn menu (by pressing 'Q'), navigate to the "Entities" tab, and search for the Portal props, which should be listed under the appropriate categories. You can also use the console command gm_spawn
followed by the prop's name to spawn them directly.
Yes, garry's mod will work with portal and you will have all the HL2 stuff.
There are no cheat codes in Garry's mod as it already contains a sandbox mod where you can fly around and spawn props. But I know there are some commands you can insert into the command console. Such as sm_cheats_1 which enables third person so If I were you do a little poking around to find some stuff like that.
Make sure you have portal installed on steam, then start up garrys mod, and go to Extensions, switch to the game content tab on the right and put a checkmark in next to "Portal". Restart Garrys mod and you will have the content for Portal available.
You do not have the correct addons needed for those props. That's why there is an error, get used to the names of addons, then download and install them from garrysmod.org
In general you only get props in Garry's Mod if they exist on your system, or in other words if you have that particular Source game installed. Whilst Portal might contain some generic Source props (and Garry's Mod may supply some itself) it's entirely likely that some (if not most) of the HL2 props will be missing if you don't have HL2
No. Unless it's a glitch, the only way you can spawn them other then mods or console is going into the NPCs section and manually spawning a zombie.
Buy Garry's mod 10 off of steam.
No, GMod (Garrys Mod) is a sandbox physics game where you can build what ever you want and can using props from many games by Valve
technically yes, there were a few updates it is still called Garrys mod 10 though
In order for Garry's Mod to work you need a minimum of one Source Engine game eg. Half-Life 2, Team Fortress 2 or Portal.
Garry's Mod 10
no because garrys mod requires that you have a game that uses the source engine