Where does “gothicus” come from?

gothicus (Late Latin) comes from Ancient Greek Γοτθικός, from Ancient Greek Γότθος, from Gothic 𐌲𐌿𐍄𐌰, from Proto-Germanic gutô, from Proto-Indo-European ǵʰewd-, from Proto-Indo-European ǵʰew- — to pour.

gothicus (Late Latin): gothic; Gothic