Atlantis Diving Centre organises transfers from the Malta International Airport to your accommodation and back. Regarding taxis or minibuses, one must always remember that the price is always for the taxi or minibus and not per person.
A taxi / minibus will pick you up from the Malta International Airport and drops you at the ferry. After crossing by ferry, another taxi / minibus will pick you up on Gozo taking you to your accommodation. Payment for the ferry crossing is only made on the trip from Gozo to Malta and you pay nothing for trip to Gozo.