I have downloaded the official Bitcoin Gold Core Client, and it is running fine...

where you download it?

From the offiical website, it just went live:

https://bitcoingold.org/downloads/

i have donwloaded direct on ghithub .. but i need a node list for add ... where can find node list?

I just used this to get going working just fine 78.193.221.106

Do you need to download the whole bitcoin chain too, or only since the hard fork?

Full chain