     // display CV input values
     display_cv_in();
 
+    // display GT input/output states
+    display_gtio();
+
     // update display
     display->display();
   }


void gt3_isr()
{
  gt3_state = function->gt_read(GT3);
  if(gt3_state)
    gt3_retrigger = true;
}

void gt4_isr()
{
  gt4_state = function->gt_read(GT4);
  if(gt4_state)
    gt4_retrigger = true;
}

void setup()

    }
    else if(b == DUINO_Encoder::Held)
    {
      gt = true;
    }
    else if(b == DUINO_Encoder::Released)
    {
      gt = false;
    }

    // handle encoder spin
