The Guardians selected Gose's contract from Triple-A Columbus on Sunday.
The left-hander elected free agency after being designated for assignment by Cleveland in late August, though he re-signed on a minor-league deal a few days later. Gose has pitched in just two big-league games this season but has a 3.27 ERA, 1.39 WHIP and 58:26 K:BB across 41.1 innings at Triple-A.