Definition of "gey"

I am nae believer in auld wives' stories about ghaists, though this is gey like a place for them - But mortal, or of the other world, here they come! - twa men and a light.

1816, Sir Walter Scott, The Antiquary, Oxford University Press, published 2002, page 207

But I'll put a gold chain around his neck, An' a gey good chain it'll be.

2001, David Thomson, The People of the Sea: Celtic Tales of the Seal-folk, Canongate Books, page 213

They were married next New Year's Day, and Ellison had begun to think himself a gey man in Kinraddie, and maybe one of the gentry.

1932, Lewis Grassic Gibbon, Sunset Song (A Scots Quair), Polygon, published 2006, page 16