Since your didn't share the model of your gateway, then look at this chart for which ones have 2.4 and 5 bands.
All gateways have WPS, for many pieces of equipment, WPS does not work, your better off choosing your network and entering the network key manually.
Where do I find this and wether I have WPS or WPA2?
Two different things WPS (Wi-Fi protected setup) Is another way of connecting wireless devices and is not recommended because of security issues always much better to enter your network key manually. WPA is a wireless encryption to keep your network secure from hackers and the like. WPA2-AES personal is the latest and best to use. As far as 2.4 Ghz or 5 Ghz as stated that depends on what router/gateway your using follow the link posted above if you have a comcast rented gateway.