ok here goes this is the stuff i can talk about that not in the advanced section.
a 2 lever lock can be easyly opened with two L shaped wires one to tension the bolt the other to lift the levers to the gate.
a 3 lever the same
a 5 lever without a barrel and curtain (if you look in to the keyway and see a silver or brass thing ) same as 2 3 lever but these lock may have anti pick notches.
if it has a curtain it may be possible with two wires but easier with a curtain pick likc this
picture taken from safeventures
or this
any more questions