'gameinfo.txt' does not exist in subdirectory. Please help!

Hello, I went on Hammer today because I decided to try to learn, and create, a map for my ‘summer project’, and I was just slapped in the face with this error message.

I went to my ‘gameinfo.txt’ file which is located here: "C:\Program Files (x86)\Steam\steamapps\braden01\garrysmod\garrysmod\gameinfo.txt
And this is what it said:

	game	"Garry's Mod"
	title	""
	title2	""
	type 	multiplayer_only

	"developer" 		"Facepunch Studios"
	"developer_url" 	"http://www.garrysmod.com/"
	"manual"           	"http://wiki.garrysmod.com/"

		SteamAppId				4000 // 218
		ToolsAppId				211
			Game				|gameinfo_path|.
			Game				hl2
			Game                            |all_source_engine_paths|hl2

Some help would be much appreciated.