Green’s Dictionary of Slang

(orig. Aus.) to walk.

1859		H. Kingsley Recollections of G. Hamlyn (1891) 76: Who knows but what Nell might come gandering back in one of her tantrums, and spoil everything.
1862		H. Kingsley Ravenshoe II 249: She gandered upstairs to the dressing-room again.
1936		San Quentin Bulletin in L.A. Times 6 May 7: GANDER, [...] walk.
1947		M.H. Boulware Jive and Sl.
1955		‘Blackie’ Audett Rap Sheet 153: I stepped out of the room and there was half a dozen detectives gandering up and down the hall.