 
  desc: When gpu program is loaded, you can only edit default param.
        When gpu program is unloaded, you can only edit basic parameter.
  			
        When you create a new gpu program, it's always unloaded, after you finish setting.
        You can use this command to load it, if your setting is right, it will build 
        named constants, you can edit default_param then.
   
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  format: loadGpg

  eg : loadGpg
