Context : Extragalactic globular clusters have been studied in elliptical galaxies and in a few luminous spiral galaxies , but little is known about globular clusters in low-luminosity spirals . Aims : Past observations with the ACS have shown that NGC 45 hosts a large population of globular clusters ( 19 ) , as well as several young star clusters . In this work we aim to confirm the bona fide globular cluster status for 8 of 19 globular cluster candidates and to derive metallicities , ages , and velocities . Methods : VLT/FORS2 multislit spectroscopy in combination with the Lick/IDS system was used to derive velocities and to constrain metallicities and [ \alpha / Fe ] element ratio of the globular clusters . Results : We confirm the 8 globular clusters as bona fide globular clusters . Their velocities indicate halo or bulge-like kinematics , with little or no overall rotation . From absorption indices such as H \beta , H \gamma , and H \delta and the combined [ MgFe ] ^ { \prime } index , we found that the globular clusters are metal-poor [ Z/H ] \leq -0.33 dex and [ \alpha / Fe ] \leq 0.0 element ratio . These results argue in favor of a population of globular clusters formed during the assembling of the galaxy . Conclusions :