For those who are still struggling with this. Georgia version 5.57 (not sure if in previous versions) has support for Lining Number Forms. This can be accessed in Microsoft Word by going to Character → Advanced → Number Forms → Lining.
It can be accessed in Adobe InDesign in the Paragraph Style Options → OpenType Features → Figure Style → Proportional (or Tabular) Lining.
I recently installed Windows 10 + Office 2013 and that version of Georgia had support for Lining Number Forms.
I just checked on my Mac (El Capitan), it is Georgia version 5.00x-4. It does NOT support the Lining Number Forms. Of course, I copied and installed the fonts from my Win 10 to my Mac and now my Mac has a version which supports them :). If that's illegal, lock me up now! I have the latest Office 365 on my Mac. I should have the latest version of Georgia too darn it!
Hope this helps someone.