Goretex is often sold as a waterproof material that breathes like a regular fabric. It's almost half true. Goretex is very water resistant. But breathable is subjective since there's no fabric breathability scale to measure against natural fibers or other synthetics.
Basically, if you are going to be static and not exerting yourself more than light duty, the Goretex jackets are awesome at keeping you dry in all but torrential downpours. Once you start moving, we recommend shedding a layer so you don't soak in your own sweat.
Almost all in like-new condition, no signs of use that can be seen (so far). The OCP/Multicam jackets tend to be a lighter weight variant, where as the older M81, DCU, and ABU variants were from the original ECWCS system and are also insulated. The OCP variants are meant as an outer shell for wet weather.
The samples we have all appear to be in really good condition, but they are still considered used and would probably benefit from a DWR wash to enhance their water repellency, just to be safe.
