The intake for a GT can be made to attach. Notice I don't say fit or work. It will technically function if you don't get a vacuum leak, but it definitely won't be right, the geometry will be off and it won't perform like it should. The Boss and GT manifolds have the throttle body located and angled differently. You really should get a good BOSS specific cold air intake, or even get a used stock one.
The artist formerly known as SteedaMatt.