  Globular clusters (GCs) are the oldest stellar system in the Galaxy, in which
the millisecond pulsars are widely believed to be the only steady {\gamma}-ray
emitters. So far 9 {\gamma}-ray GCs have been identified and a few candidates
such as 2MS-GC01 and IC 1257 have been suggested. In this work, after analyzing
the publicly-available Fermi-LAT data we confirm the significant {\gamma}-ray
emission from 2MS-GC01 and IC 1257 and report the discovery for {\gamma}-ray
emission from NGC 5904 and NGC 6656 within their tidal radii. Also a strong
evidence of significant {\gamma}-ray emission is found from FSR 1735. From the
observed {\gamma}-ray luminosities, the numbers of MSPs that are expected to be
present in these GCs are estimated.
