The Verdict: Clear Path
You have the seven years of lawful residence Greece asks for. Your first step is the PEGP certificate in Greek language and civics, unless Greek schooling exempts you; then apply.
Article 5(1)(d) of the Citizenship Code sets seven continuous years of lawful residence. Since Law 4735/2020 the application cannot be filed without the PEGP certificate or an exemption.
The PEGP certificate is a written exam in B1 Greek plus Greek history, geography, culture and institutions, held in April and November, pass mark around 70%. Recent pass rates have run between 44% and 51%, so plan for more than one attempt. You are exempt if you completed the required years at a Greek school or a Greek university. Since article 96 of Law 5225/2025, applicants over 62 may sit the written exam rather than the oral one.
You make a naturalisation declaration before your mayor with two Greek citizens as witnesses, then apply to the Ministry of the Interior. The Naturalisation Committee gives an opinion, a security check follows, and the Minister decides. The decision is discretionary and published in the Government Gazette; you must take the oath within a year of publication or it is revoked. Your minor unmarried children become Greek with you.
The Committee also weighs integration under article 5A: tax returns, social security contributions and a steady address history help.