Green’s Dictionary of Slang

to have a look at.

1903		Cincinnati Enquirer 9 May 13/1: Gander—To stretch or rubber your neck [DA].
1938		Flash! (Wash., D.C.) 21 Feb. 11/1: gander—Meaning to look, and look real hard so as to repeat the details to the first news-hawk you meet.
1940		R.L. Bellem ‘Death’s Passport’ in Goodstone Pulps (1970) 112/1: I never gandered any spooks when I was sober.
1948		J. Archibald ‘Klump a la Carte’ Popular Det. July 🌐 He picked up the menu [...] and gandered the setup du jour.
1952		(con. 1920s) ‘Harry Grey’ Hoods (1953) 276: I’ll gander around myself. I’ll keep you posted.
1960		E. De Roo Big Rumble 13: What’s the matter? Never gandered at nice toes before?
1979		‘Iceberg Slim’ Airtight Willie and Me 31: Now gander the sweetness of the ’ho’s style.
1984		Eble Campus Sl. Mar. 3: gander, take a gander – look at: Just gander at this and tell me what you see.
1989		B. Reed ‘Messman on C.E.’s Altar’ in Passing Strange (2015) 13: Someonething [sic] like that had directed his slow loafers into here for to gander at his own mug immortalized on this wall there.
2002		R. Garver Heavens to Murgatroid n.p.: Now, if Bell and Pet, at that moment, turned around and gandered at Grandpa they would’ve fallen dead, ...