Hello Krishna,
Gir cows: The native tract of the breed is the area around forests of Gir including Junagadh, Bhavnagar, Rajkot and Amreli districts of Gujarat.
Gir cows are good milk producers. Bullocks can drag heavy loads on all kinds of soils, be it sandy, black or rocky. It is docile in nature. One of the three BEST milch breed of India.
It has contribution in developing other indigenous breeds like Deoni, Nimari etc.
The climatic requirement in tamil nadu is not very suitable for gir cows but still some farmers are rearing them. The milk yield is reduced. You can get the breeds from Gujarat Livestock development Board.
Regards
Ashwini S