Ok, after reviewing Unitrunker data for the past several weeks in the Central NJ area, and with observations from others, I think I have figured out how the unidentified talkgroup line-up goes.  This is subject to verification from all those who wish to help verify before submitting as confirmed to the database:
Talkgroup #   Designation:
1                    NJTA Unidentified
4                    NJTA Unidentified
5                    NJTA Unidentified
9                    NJTA Radio Techs
10                  NJTA Fleetwide
13                  GSP Unidentified
14                  GSP Swainton Yard Ops
15                  GSP White Horse Yard Ops
16                  GSP Ocean Yard Ops
17                  GSP Herbertsville Yard Ops
18                  GSP Telegraph Hill Yard Ops
19                  GSP Clark Yard Ops
20                  GSP Union Yard Ops
21                  GSP Clifton Yard Ops
22                  GSP Paramus Yard Ops
23                  GSP Unidentified
24                  GSP Unidentified
28                  GSP Unidentified
29                  GSP Unidentified
30                  TP Announcement Patch
33                  TP Amber?
34                  TP District 1 Ops
35                  TP District 2 Ops
36                  TP District 3 Ops
37                  TP District 4 Ops
38                  TP District 5 Ops
39                  TP District 6 Ops
40                  TP District 7 Ops
41                  TP District 8 Ops
42                  TP District 9 Ops
43                  TP District 10 Ops
46                  TP Unidentified
47                  TP Unidentified
49                  TP Unidentified
50                  TP Unidentified
51                  TP Unidentified