Georges Cyr was born in Montgeron (Seine et Oise), in France. He started his artistic career on the advice of the painter Guillaumin. As from 1924, Cyr was exhibiting at the Salon des Independents in Paris. In 1934, following an unhappy emotional experience, he decided to leave France and tour the Middle East and the Far East. Having spent a few weeks in Beirut, he fell in love with the city and decided to settle in Ain El Mraisse. His studio was so popular it was viewed by many as an art school and it became the favorite meeting place of artists like Abboud, Kanaan, Onsi, Aouad, Basbous and others.
Cyr was not only a painter. He also worked with mosaics, ceramics, and stained glass. He taught painting and history of art, wrote numerous essays and lectured on the subject. Many see him as the true pioneer of modern art in Lebanon.
Cyr held an important exhibition in the St. Georges Hotel in 1935. This was followed by another at the Stade du Chayla, Beirut (1953). In 1965, Brigitte Shehadeh organized a retrospective exhibition of the artist's work at the Vendome Hotel in Beirut.
An entire room dedicated to the works of Georges Cyr can be seen in the Havre Museum in France.
Cyr was awarded the Lebanese National Order of the Cedar.