Kadesh-barnea lay in the south of Canaan, Num_34:4Deu_1:19Jos_15:3.
Gaza was in the south-west of Canaan. So he here signifies that Joshua did in this expedition subdue all those parts which lay south and west from Gilgal.
Goshen; not that Goshen in Egypt, but another in Judah, Jos_11:16 15:51.