Took it, i.e. part of it; or Gilead is here taken more strictly. See Poole on "Numbers 32:29"; Genesis 31:21 Deuteronomy 3:12,13.
Related Commentaries of Numbers 32:39
Numbers 32:39
39 And the children of Machir the son of Manasseh went to Gilead, and took it, and dispossessed the Amorite which was in it.