Both destinations are served by Vishakhapatnam (VTZ). Since there's no flight route between them, the best way to travel is by road.
Gajuwaka
Fly to Vishakhapatnam (VTZ), then travel by road to Gajuwaka. Taxis, buses, and private cabs are available from the airport.
Visakhapatnam
Fly to Vishakhapatnam (VTZ), then travel by road to Visakhapatnam. Local transport options include taxis, auto-rickshaws, and state buses.