The Gigabyte site for that board says this, under "internal I/O connectors":
2 x SATA 6Gb/s connectors
I believe SATA 3.0 is 6 Gb/s, so yes, it supports 3.0.
I don't understand the rest of your post. Games will load quicker on an SSD, but I don't think you'll see much improvement in playing the game.