  The majority of the activity around nearby (z ~ 0) supermassive black holes
is found in low-luminosity active galactic nuclei (LLAGN), the most of them
being classified as low ionization nuclear emission regions. Although these
sources are well studied from radio up to X-rays, they are poorly understood in
gamma-rays. In this work we take advantage of the all sky-surveying
capabilities of the Large Area Telescope on board Fermi Gamma ray Space
Telescope to study the whole Palomar sample of LLAGN in gamma-rays. Precisely,
the four radio-brightest LLAGN in the sample are identified as significant
gamma-ray emitters, all of which are recognized as powerful Fanaroff-Riley I
galaxies. These results suggest that the presence of powerful radio jets is of
substantial importance for observing a significant gamma-ray counterpart even
if these jets are misaligned with respect to the line of sight. We also find
that most of the X-ray-brightest LLAGN do not have a significant gamma-ray and
strong radio emission, suggesting that the X-rays come mainly from the
accretion flow in these cases. A detailed analysis of the spectral energy
distributions (SEDs) of NGC 315 and NGC 4261, both detected in gamma-rays, is
provided where we make a detailed comparison between the predicted hadronic
gamma-ray emission from a radiatively inefficient accretion flow (RIAF) and the
gamma-ray emission from a leptonic jet-dominated synchrotron self-Compton (SSC)
model. Both SEDs are better described by the SSC model while the RIAF fails to
explain the gamma-ray observations.
