Does intel 82865g supports Nvidia GT series

The motherboard you have mentioned is having age-old AGP slot for Graphics cards. So any PCI Express card can't be used on this board. The cards u have mentioned are actually PCI express cards. So they can't be used.
The latest AGP based solution for you will be Sapphire HD4670 1GB DDR2 @ 5.1k. Its a AGP based version of its PCI express brother.

IMO upgrade your pc .rather than investing on old tech .

UPGRADE is the word