As citizen of the EU you can stay here without a residence announce. It is legal to live there.
When you want to stay longer as three months, you register at
Department for Citizenship and Expatriate Affairs
St Elmo's Square
There for you need:
· Valid passport or identity card
· Certificated health care insurance
· Your Incomes confirmation
This can be any proof that the person is receiving the required income or has sufficient resources in the bank.
Under IDENTITYMALTA you find information and forms for selves-sufficient as pensioner (Economic Self Sufficiency – CEA Form J)
After 5 years permit on Gozo, you can then apply for a permanent residence document, which confirms your rights to live in the country where you now live permanently, without any conditions: