Here is the wiring diagram that I have:
teg's blue left side plug (13 pins)

1. blu tach signal
2. grn/org check engine indicator
3. yel/red oil pressure switch
4. NOT USED 5. wht/blu charge indicator
6. NOT USED
7. yel/grn coolant temp
8. blk ground
9. red/blu cruise (if you have cruise)
10. yel hot
11. NOT USED NOT USED
12. pink maintenance (not used)
13. NOT USED NOT USED

teg's right side blue plug (16 pins)

1. grn/red e.brake signal
2. red/grn high beam
3. grn/yel right turn
4. grn/blu left turn
5. NOT USED NOT USED
6. blk/yel power
7. red/blk power
8. red power
9. blu/red abs (not used)
10. grn trunk switch
11. org vehicle speed sensor
12. NOT USED
13. blu/wht low fuel Not USED
14. yel/wht fuel gauge
15. lt grn/red door switch Not USED
16. red/blu seat belt

civic's left side grey plug (12 pins)

1. yel/wht fuel gauge
2. yel/blu vehicle speed sensor
3. grn/yel right turn
4. grn/blu left turn
5. wht/blu charge
6. yel/red oil pressure switch
7. NOT USED
8. blu tach signal
9. NOT USED
10. blk/yel power
11. red/blk power
12. red power

civic's right side grey plug (10 pins)

1. red/grn high beam indicator
2. grn/red e brake signal
3. NOT USED NOT USED
4. NOT USED
5. grn/org check engine indicator
6. blk ground
7. yel/grn coolant temp
8. yel hot
9. grn trunk switch
10. blu/wht seat belt

As far as fitting it in, you need to either A) modify your gsr gauge cluster
by cutting the surround down so it is flush with the cluster itself. By
doing this you will not have the luxury of the clear plastic cover, just
don't start breaking needles =). This is the method I used.
Or you can B) Cut the gauge cluster surround piece (the part that houses the
vents clock etc.) So that the entire cluster including the clear plastic
cover will remain intact. Afterwards, zip tie the cluster to the stock
mounting tabs and fit the surround on. I plan on molding the surround with
bondo to get rid of any gaps that are left, just been too busy to do that
yet. If you have any other questions just drop me an email.
Ben Rossman