You can add a push button for logic gate and write a callback for this button.
For example, for AND gate you can use 3 edit boxes (2 for inputs and 1 output) and push button for AND gate and add following code in the push button callback:
if editfield1.Value == editfield2.Value
if editfield1.Value == 1
editfield3.Value == "1"
else
editfield3.Value == "0"
end
else
editfield3.Value == "0"
end