The FCRA applies to a "consumer," which is defined in section 603(c) as an "individual," as opposed to the broader category of "persons," which expands scope to an "individual, partnership, corporation, trust.....,"  etc.

Consumer reports, as set forth in section 603(d), apply only to consumers.

If you co-sign with individual liability, you would, in my opinion, be assuming debt as a consumer, and thus subject to credit reporting under the FCRA, as well as its protections.