  We present the results of point-contact spectroscopy measurements in
polycrystalline RuSr_2GdCu_2O_8 samples previously characterized from both the
structural and the electrical point of view. AC susceptibility and resistivity
measurements, as well as SEM and optical microscopy, indicate that the
polycrystalline material is made up of small, weakly connected grains. Possibly
because of this morphology, point-contact measurements turned out to be rather
difficult. Best reproducibility of the conductance curves was achieved in point
contacts obtained by pressing Au or Pt-Ir tips on the surface of the samples.
The low-temperature conductance curves reproducibly show a clear zero-bias cusp
that might be interpreted as due to Andreev reflection at the normal
metal-superconductor interface in the case where the superconducting order
parameter has a pure d-wave symmetry - even though alternative explanations
cannot be ruled out. In this paper we show that these curves can indeed be
fitted, in the framework of the generalised BTK model, by using pure d-wave
symmetry and a gap of the order of 6 meV. Finally, we present the temperature
dependence of the conductance curves from 4.2 K up to the critical temperature
of the junctions.
