Outer Limits 4x4 Board

Hi guys, I'm wondering if anyone can tell me what the std offset is for a 2003 GU patrol ute. I've got the factory steelies that have the small hole in the spokes. I've read they have a neutral, others say +ve 10, and another says -ve 13
WTF?
Help please, I want to buy some mags and need to know what I want
Lloyd

Are we talking about a std wheel or wide wheel Ty61?
leaf or coil?

The standard GU steel 16x8 rims are +10.

thanks Geec. They are the std steel wheel 6 spoke with the real small hole between the spokes. It is coil.
Now +10 means the outer rim is offset inward from the hub mount flange right?