Vehicular Networks represent an emerging technology that enables the use of network services by drivers and vehicle passengers. However, the heterogeneity of vehicular networks, which can use various wireless technologies, represents a challenge for the development of communication protocols. The Software Defined Vehicular Networks (SDVN) paradigm allows flexible design of these new protocols. This work proposes a new geocast protocol for Software Defined Vehicular Networks. Simulation results reveal that the proposed protocol outperforms the Inter- Vehicular Geocast protocol and the flooding algorithm in terms of delivery rate and signaling overhead.