  Let G be an arbitrary group and let K be a field of characteristic different
from 2. We classify the G-gradings on the Jordan algebra of upper triangular
matrices of order n over K. It turns out that there are, up to a graded
isomorphism, two families of gradings: the elementary gradings (analogous to
the ones in the associative case), and the so called mirror type (MT) gradings.
Moreover we prove that the G-gradings on this algebra are uniquely determined,
up to a graded isomorphism, by the graded identities they satisfy.
