Bhagavad Gita

http://www.scribd.com/doc/21350915/Download-Bhagavad-Gita-in-Tamil-in-PDF-format-EBook-for-Free
 
Vaishnava Version / Chapter Wise
http://www.srivaishnavam.com/gita/gita.htm
http://www.youtube.com/watch?v=fZInkPayy3E

Subramanya Bharathi
http://www.projectmadurai.org.vt.edu/pm_etexts/pdf/pm0014.pdf

http://pm.tamil.net/pub/pm0014/pm0014.pdf 

Gita Malar
http://temple.dinamalar.com/bhagavad_gita_main.php

Vayoor

https://www.youtube.com/user/cyvoorg#g/u

Video Options By Duration

Option 1 - 2:37:39
https://www.youtube.com/playlist?list=PL4214D46F69C3705D
Option 2 - 3:30:36
https://www.youtube.com/playlist?list=PLWmdUi97iZ-Ttt0aQs9JUQYukgUpEJF0S
Option 3 - 8:15:19
https://www.youtube.com/playlist?list=PLA6749F80778F9EF0
Option 4 - 9:04:33
https://www.youtube.com/playlist?list=PLE641F70A11042424

Audio
http://www.mantraaonline.com/gita/

Gita Class / Recitation
http://bhagavadgitaclass.com/bhagavad-gita-recitation-in-sanskrit-with-tamil-translations/  
http://t1mi.blogspot.com/search/label/Iskcon

Play
https://play.google.com/store/search?q=Gita in Tamil
https://play.google.com/store/search?q=tamil%20gita