It has. It replaces the LoadFromStream functions, I think.

There is at GLTexture.pas in procedure TGLPersistentImage.LoadFromFile(const fileName: string);

following code:

Code:
 
if ApplicationFileIODefined then
 begin
  gr := CreateGraphicFromFile(buf);
  if Assigned(gr) then
  begin
   Picture.Graphic := gr;
   gr.Free;
   Exit;
  end;
 end
 else if FileExists(buf) then
 begin
  Picture.LoadFromFile(buf);
  Exit;
 end;
And if you create TGLVfsPAk, it creates the ApplicationIO