2 occurrences in 2 dictionaries
Gad'ites
Members of the tribe of Gad. De 3:12; Jos 22:1; etc.
And this is the land which we possessed at that time, from Aroer by the river Arnon, and half of Mount Gilead, and its cities, I gave to the men of Reuben and of Gad.
Then Joshua called for the Reubenites and the Gadites, and the half tribe of Manasseh,