  We investigate isometric immersions $f\colon M^n\to\R^{n+2}$, $n\geq 3$, of
Riemannian manifolds into Euclidean space with codimension two that admit
isometric deformations that preserve the metric of the Gauss map. In precise
terms, the preservation of the third fundamental form of the submanifold must
be ensured throughout the deformation. For minimal isometric deformations of
minimal submanifolds this is always the case. Our main result is of a local
nature and states that if $f$ is neither minimal nor reducible, then it is a
hypersurface of an isometrically deformable hypersurface
$F\colon\tilde{M}^{n+1}\to\R^{n+2}$ such that the deformations of $F$ induce
those of $f$. Moreover, for a particular class of such submanifolds, a complete
local parametric description is provided.
