You must apply for a family reunification visa if you want to travel to Greece to be with family. Only the resident's spouse and minor children under the age of 18 are eligible to apply. This visa may also be obtained for the development of a family relationship, such as through marriage or adoption.
Documents Required for Family Reunification Visa are as follow
Gather the necessary documents before applying for a long-term family reunification visa for Greece
Greece Family Reunification Visa interview requirements:
Process- Greece Family Reunification Visa