this is my board
http://www.gigabyte.com/products/product-page.aspx?pid=1724#ov
so how do i find the manual for it and then how do i find out what the light means
You find the manual by looking for it using a search engine of some sort, and then you find out what the light means by looking it up in the manual.
We're not your own personal tech support solution. Have some initiative.
EDIT: Okay, this is just stupid. There's a link to the manual
on the very page you linked to, in the downloads section. If you'd spent two minutes looking around you would have found it and then you wouldn't have needed to ask.