I asked the same question a couple weeks ago. It works. It shows as 'out of date' but my understanding is that nothing other than cosmetic issues. No code problems.
They are working on it very soon. I believe it is scheduled right after the Activity coding is completed.
Kyle posted more info in this thread:
www.joomlapolis.com/forum/153-professional-member-support/229485-documentation-on-groupjive-member-status#264068
Your mileage may vary, but GJ is working perfectly with my system which is also running the most recent core and latest updates of all modules & plugins.
hope this helps,
Satchi