It is only a walk from Griffith University Village to one of the two G-Link Tram stops. From here you can purchase a ticket on board the tram to get you where you need to go.
There is also the 709 bus to Helensvale, which leaves from the same stop. Payment is made to the driver when you board the bus. From Helensvale train station you can either head north towards Brisbane or south towards Robina.