Some thoughts...
(1) GULC PT has worked to create basically an internal job market in and around DC of select positions that want to hire GULC PT students. Many of these jobs pay $50k or more, meaning more than you might otherwise make after you graduate with a Tier 3 or Tier 4 law degree.
(2) Even assuming there is a "stigma" insofar as snobbery of certain full-time students, who cares? If employers don't care, you shouldn't either.
(3) The PT choice affects your life for an extra year, whereas the GULC choice affects your professional life forever.
(4) PT at GULC is not an add-on created to appease working people. It's the original point of the school, to educate the "men of the government," and the full-time program is the afterthought.
(5) Assuming no scholarship and no personal funding to pay for your own expenses in DC, PT is certainly the better option financially.
Just my tuppence. I think there certainly should be a stigma attached to any 22-year-old who is not working at all and effectively gaming the system, but those who are working while keeping up the course load, journal and sometimes even a clinic should certainly be respected at least as much as any other GULC student.