Gateway sold this laptop with 3 different network adapters. 2 Wireless Broadcom and 1 Marvell Yukon NIC (wired). If you can determine which one your machine contains, you can download drivers from the manufacturers website: (why you didn't check there first is beyond me)
And we provide a comment box for a reason..... so you can tell us about your hardware. Next time, I suggest you use it.