  The lowest dimensional gluon condensate $G_2$ is analyzed at finite
temperature and chemical potential using a holographic model of QCD with
conformal invariance broken by a background dilaton. Starting from the free
energy of the model, the thermodynamical quantities needed to determine the $T$
and $\mu$ dependence of the gluon condensate are evaluated. At high temperature
the gluon condensate is independent of chemical potential. Moreover, at $\mu=0$
and in the string frame, the temporal and spatial Wilson loops at low
temperature are computed; they are related to the (chromo) electric and
magnetic components of $G_2$, respectively. The $T$-dependence of the two
components is separately determined.
