  We report on an identification of a new gamma-ray emitting narrow-line
Seyfert 1 galaxy (gamma-NLS1), SDSS J095909.51+460014.3 (z = 0.399), by
establishing an association with a gamma-ray source 4FGL 0959.6+4606, although
its low-energy counterpart was suggested to be a radio galaxy 2MASX
J09591976+4603515. WISE long-term light curves of these two sources reveal
diverse infrared variability patterns. Brightenings of 2.5 mag are detected for
the former source, while flux decays of 0.5 mag are found for the other one.
More importantly, the time that the infrared flux of the NLS1 rises, is
coincident with the time of flux increase of 4FGL 0959.6+4606. At the same
time, no infrared activity of the radio galaxy has been observed. A specific
analysis of 15-month Fermi-LAT data, aiming at the high gamma-ray flux state,
yields a significant source (TS =43). The corresponding gamma-ray localization
analysis suggests that only the NLS1 falls into the uncertainty area, further
supporting the updated association relationship. A broadband spectral energy
distribution of SDSS J095909.51+460014.3 has been drawn and well described by
the classic single-zone homogeneous leptonic jet model. Its jet properties are
investigated and found to be comparable with the known gamma-NLS1s.
