Is there a "GS" trim from 2014-2016 Kia Rio?

Looking to buy a used 2014-2016 Kia Rio, and while looking through local used cars, almost every one write "GS" as the trim even thought there are lots of differences between the features of the cars, and searching online I did not find anything about what's standard in this "GS" trim or if its actually a thing,

Thanks in advance,