Fixed #312

Marlin/Configuration.h

 //#define ULTIMAKERCONTROLLER //as available from the ultimaker online store.
 //#define ULTIPANEL  //the ultipanel as on thingiverse
 
-// The RepRapDiscount Smart Controller
+// The RepRapDiscount Smart Controller (white PCB)
 // http://reprap.org/wiki/RepRapDiscount_Smart_Controller
 //#define REPRAP_DISCOUNT_SMART_CONTROLLER
-
+
+// The GADGETS3D G3D LCD/SD Controller (blue PCB)
+// http://reprap.org/wiki/RAMPS_1.3/1.4_GADGETS3D_Shield_with_Panel
+//#define G3D_PANEL
 
 //automatic expansion
-#if defined(ULTIMAKERCONTROLLER) || defined(REPRAP_DISCOUNT_SMART_CONTROLLER)
+#if defined(ULTIMAKERCONTROLLER) || defined(REPRAP_DISCOUNT_SMART_CONTROLLER) || defined(G3D_PANEL)
  #define ULTIPANEL
  #define NEWPANEL
 #endif 

Marlin/pins.h

 #endif
 #define PS_ON_PIN          12
 
-#ifdef REPRAP_DISCOUNT_SMART_CONTROLLER
+#if defined(REPRAP_DISCOUNT_SMART_CONTROLLER) || defined(G3D_PANEL)
 #define KILL_PIN           41
 #else
 #define KILL_PIN           -1
       #define BTN_EN2 35
       #define BTN_ENC 31  //the click
 
-      #define SDCARDDETECT -1  // Ramps does not use this port
+      #ifdef G3D_PANEL
+        #define SDCARDDETECT 49
+      #else
+        #define SDCARDDETECT -1  // Ramps does not use this port
+      #endif
     #endif
 
   #else //old style panel with shift register