Info about the GSO support

I’m working on an embedded network interface (core by Synopsys) and I’ve already
written my first Linux network device driver.
My hardware has an internal DMA so I’ve used the scatter gather implementation.
Moreover, this HW doesn’t support the TSO feature. 
I’m wondering if I can use the new GSO as well. 
Finally, I’ve a kernel 2.6.17.14; where can I get the GSO patches for this
kernel version?
Thanks a lot
Regards
Giuseppe