???? you dont get 208 out of 1 leg,
GND is ground
LO is neutral
L1 is 120v, measured from L1 to L0
L2 is 120v, measured from L2 to L0
L3 is 120v, measured from L3 to L0
the 208v is when you pull 2 legs, measured from L1, L2 or L2, L3 or L1, L3.... all depends on which generator you are using...