G
| Gall stones | Benedict, Drogo, Florentius of Strasburg, Liberius |
| Gambling addicts; compulsive gambling; uncontrolled gambling | Bernardine of Siena |
| Gap | Arnulph |
| Garage, or gas station, workers | Eligius (Eloi) |
| Gardeners | Adelard, Fiacre, Rose of Lima, Adam |
| Garment workers | Homobonus |
| Gas station workers | Eligius (Eloi) |
| Geese | Martin of Tours |
| Geese; goose | Gall, Martin of Tours |
| Genoa, Italy | George, John the Baptist, Syrus of Genoa, Barbara |
| Geometricians | Thomas, Apostle |
| Georgia, former USSR | George, Nino |
| Georgia, USA | Immaculate Heart of Mary |
| Germany | Anskar, Michael the Archangel |
| Ghent, Belgium | Amalburga, Bavo, Macarius of Antioch, |
| Gibraltar | Bernard of Clairvaux |
| Gilders | Clare of Assisi, Eligius (Eloi) |
| Girl Scouts | Agnes of Rome |
| Girls | Agnes, Maria Goretti |
| Glandular disorders | Cadoc of Llancarvan |
| Glasgow, Scotland | Kentigern |
| Glassworkers | Luke |
| Glaziers | Lucy |
| Glendalough, Ireland | Kevin |
| Glove makers | Crispin and Crispinian, Gummarus, Mary Magdalene |
| Goa, India | Francis Xavier |
| Goitres | Blaise |
| Golden-Tounges orator | Peter Chrysologus |
| Goldsmiths | Dunstan, Anastasius, Eligius (Eloi) |
| Good finances | Infant Jesus of Prague |
| Governors | Ferdinand III of Castile |
| Gozo | George |
| Grandfathers | Joachim |
| Grandmothers | Anne |
| Grandparents | Anne, Joachim |
| Gravediggers | Antony the Abbot, Joseph of Arimathea |
| Greece | Paul, Apostle |
| Greece | Andrew, Apostle, George, Nicholas of Myra |
| Greek Catholic Church in America | Nicholas of Tolentino |
| Greek Catholic Union | Nicholas of Myra |
| Greeting Card manufacturers | Valentine |
| Greetings | Valentine |
| Grocers | Michael the Archangel |
| Gronigen, Nederlands | Walburga |
| Grooms, bridegrooms | Louis IX, Nicholas of Myra |
| Guardian angels | Raphael the Archangel |
| Guardians | Gummarus, Joseph of Palestine |
| Guards | Matthew the Apostle |
| Guatemala | James the Greater |
| Gunners | Barbara |