I am assuming that you mean GPA and GPA w/o.
GPA w/o means that GPA will be calculated without +/-. e.g. A-=4 and B+=3. GPA is the GPA calculateith with +/-, meaning A- is 3.667 and B+ is 3.333.
From what I've heard, if your university does not use the +/- system, GPA w/o will be the one they look at and vice versa.
Hope that helps.