Green’s Dictionary of Slang

gorry! excl.

also gorree!

[mid-19C+] (orig. US) a euph. for God and used as such in various mild excls., e.g. gorry mighty!

In exclamations

by gorry! (also be gorry! by garra! by gorra! by gorram! by gurry! by kori!)

[mid-19C+] (orig. US) a euph. for by God!