Yes, and no.
I mean, we have indeed gained the information now that MG was the person referred to as "the friend (with whom JJ supposedly was with)" by/in previous news reports.
I'm pretty pedantic about these things (if you haven't yet guessed... lol), so just pointing out that we knew about her participation, albeit as an unnamed party.
I think we just have to be cautious, at least until we get some solid MSM information/permission, in order to infer that this is because MG = cadre of PAP intimates; rather than that MG simply = bosom friend of Lori's.
After all, MG balked instantaneously at being asked to take her part in Lori's carefully constructed alibi; so there's that arguing against MG's being part of a commanded monolith.