That doesn't make sense, the latest version of the pipeline doesn't include the "GoZScript..." line in the UserSetup file. Especially since that line was only ever present in the 2012 version of Maya.
Regardless, your userSetup for 2011 64bit should look like this:
// HeroEngine, Copyright (c) 2002-2012 Idea Fabrik Plc. All rights reserved.
//
www.heroengine.com//Add the following lines to you userSetup.mel file if you have one, if not, use this one.
//DO NOT change the order
loadPlugin "maya2011_amd64_Release";
pluginInfo -edit -autoload true "maya2011_amd64_Release";
loadPlugin "HeroShader_64bit";
pluginInfo -edit -autoload true "HeroShader_64bit";
source AnimationTools;
source AssetTools;
source CharacterTools;
source CreateSRB;
source grannyTrackMaskUI;
//source grannyu; //by using evalDeferred, maya will execute this after initialization, since this script is dependant on maya plugs and such, this is the way to do it.
evalDeferred("source grannyu.mel");