I receive a call from this number today but I know who she is. Brenda Washington-O'Neale, who I met this weekend, is a Destination Wedding Coorditanor/travel agent.
Her web site is
http://withthisringevents.vpweb.com

Her Facebook page is
http://www.facebook.com/#!/pages/With-This-Ring-Destination-Wedding-and-Honeymoon-Travel-Agency/112083238835095

I'm not sure why she uses this GNC phone number to call people but she is a real person and not spam. The best number to reach her at is 412-461-6832.

Hope this helps :)
Stacey

Rcvd a quick 5 second message today on my work voicemail from a "Brenda O'Neil" at this number but she gave me a different call back number.  Googled (412) 288-4600 and it comes up as GNC so must be some sort of solicitation.  Not calling Brenda back!