[Soekris] pin out to tap 5V +/- on net4521

[Zac Morris]

For a net4521:

I need to first test an assumption:

The net4521 has a built in power regulator?  So I can just drive it 
directly off my truck's 12v power?

If so I'm wondering if anyone can advise as to which (if any) pins on 
JP3  (the 14 pins near the power regulator)  or JP9 (the 6 pins near the 
power regulator) that would allow me to tap 5V +/- of regulated power 
for powering a small GPS module&antenna circuit:

GPS module:
Operating Voltage 5 ± 0.25 Vdc, 50 mVp-p (max) **180 mA (continuous on)

Antenna:
DC Voltage 2.7V/3.0V/3.3V/5.0V/3.0V to 5.0V/other  Current 5mA 
/11mA/15mA Max


Is there enough "spare" power on these pins to recommend doing it this 
way, or should I use an external power supply (which would be a pain).

THANKS!
-Zac Morris