Apostolos Geralis was born on the island of Mytilene in 1886 and died in Athens.

In 1896 he enrolled at the School of Fine Arts, Athens, where he studied painting under Dimitrios Geraniotis, Spyros Vikatos, Georgios Jakobides and Georgios Roilos.

Between 1910 and 1915 he held a teaching position at the Pancyprian Gymnasium in Nicosia and later, between 1919 and 1920 he continued his studies in Paris at the Academie Julian.

His work belongs to the sphere of academism with influences by both the Munich and the French Schools. His main subject matter being everyday scenes of ordinary people depicted in a tranquil manner.

Geralis held several solo exhibitions in Athens and participated in many group exhibitions such as the 1934 Venice Biennale.

His work is found in public and private collections, notably: The National Gallery of Greece, the Athens Municipal Gallery, the Averoff Gallery, the Leventis Gallery, the Koutlides Collection and the National Bank of Greece.