GDL DECALS As of May 1, 2010, any driver under the age of 21 driving with a probationary license must display these red decals on the top left corner of both plates.   These can appear on any valid plate - from the 1959 base to the newest base.
 
They consist of 2 pieces - the bottom part that sticks to the plate, and the top part, which is the red rectangle.
These are connected via velcro, so that the red piece can be removed from the plate when a non-GDL driver is using the car.
Go get your decals, dude !!
(from NJ MVC video)
  

Diagonal view of a plate with the decal

   

Close-up of the decal

   

Close-up of a plate with the decal off

   

Close-up of EVZ-135 from NJMVC

  

Joe PuglieseGDL Temp tag
New Jersey License Plate GDL

Joe Pugliese
New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

Red tape maybe ? Not a GDL decal.
Joe Pugliese
New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

New York plate with GDL
James Hufnagel

Arizona vanity (NY #) with GDL
James Hufnagel

New Jersey License Plate GDL

Jon Cohen
New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

GDL plate mount
James Hufnagel
New Jersey License Plate GDL

GDL Trailer ?!?
James Hufnagel
New Jersey Trailer License Plate GDL

Old base Pennsylvania plate
James Hufnagel

Pennsylvania plate
James Hufnagel

'10 Nonpass Sticker on '15 plate
James Hufnagel
New Jersey License Plate GDL

Joe Pugliese
New Jersey License Plate GDL

Temporary with GDL decal
New Jersey License Plate GDL

Choose Life COURTESY
New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

Virginia plate with GDL decal

New Jersey License Plate GDL

New York plate with GDL decal

New Jersey License Plate GDL

New York plate with GDL decal

New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

Teenage dentist driving a Mercedes ?
New Jersey License Plate GDL

And here's a teenage doctor.
Remember Doogie Howser, M.D. ?
New Jersey License Plate GDL

2 Teenage drivers ?
New Jersey License Plate GDL

New Jersey Commercial License Plate GDL

New Jersey Commercial License Plate GDL

New Jersey Commercial License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

Jeff Fazekas
New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

New Jersey License Plate GDL

NJMVC web site
New Jersey License Plate GDL