Go on. The sketch gives you full instructions:
// Set the pins to the correct ones for your development shield
// ------------------------------------------------------------
// Standard Arduino Mega/Due shield : <display model>,38,39,40,41
// CTE TFT LCD/SD Shield for Arduino Due : <display model>,25,26,27,28
// Teensy 3.x TFT Test Board : <display model>,23,22, 3, 4
// ElecHouse TFT LCD/SD Shield for Arduino Due : <display model>,22,23,31,33
//
// Remember to change the model parameter to suit your display module!
UTFT myGLCD(ILI9481,38,39,40,41);
UTFT has drivers for ILI9481, ILI9486, R61581. Try each one in turn.
If UTFT does not work, TFT_HX8357 has drivers for ILI9481, ILI9486, HX8357B, HX8357C
David.