<p>You said yourself that the GPA is undefined. It shouldn’t be defined at all, but choosing to define it as a 0.0 is just as bad as choosing to define it as a 4.0.</p>
<p>For practical purposes the school may define it as a 0.0. School councilors may choose to define it as a 4.0 to motivate the student to “keep your 4.0.” Obviously, both are strictly incorrect, but I have no problem with either approach, because they both serve different purposes.</p>