| Gabinus, Priest and Martyr, Father of St. Susanna of Rome |
| Gabriel Lalement, Jesuit Priest, North American Martyr |
| Gabriel of Our Lady of Sorrows, Passionist Priest |
| Galdino Della Scala, Archbishop of Milan |
| Galganus (Galgano Guidotti), Hermit, Confessor |
| Gall, Abbot |
| Galla, Martyred in Corinth |
| Gallicanus, Roman Officer, Martyred in Egypt |
| Gallus, Bishop of Clermont |
| Gamaliel the Elder, teacher of St. Paul |
| Gangulph of Varennes, Martyr |
| Gaon (Godo) Founding Abbot of Fontanelle Abbey, Normandy |
| Gaspar Bertoni, Italian Priest, Founder of the Stigmatines |
| Gaspar del Bufalo, Founder of the Society of the Precious Blood |
| Gasper (aka Casper), one of the Three Magi |
| Gatianus, First Bishop of Tours |
| Gaudentius, Bishop of Brescia |
| Gaudiosa, Martyr |
| Gaudiosus, Bishop of Salerno |
| Gaudiosus, Martyr |
| Gauthier (Walter) de Bruges, Franciscan theologian and Bishop of Poitiers |
| Gauzelin, Bishop of Toul |
| Gebhard, Bishop of Constance |
| Gedeon, Bishop of Besanson |
| Gelasius I, Pope to whom the Gelasian Sacramentary is ascribed |
| Gemelllus, Martyred in Paphlagonia |
| Gemignanus, Bishop of Modena |
| Geminianus of Sirmium, Martyr |
| Geminianus, Bishop of Modena |
| Geminus, African, martyred by the Vandals |
| Gemma Galgani, Mystic who had the stigmata |
| Genesius (Genest), 37th Archbishop of Lyons |
| Genesius (Gines) of Arles, Notary and Martyr |
| Genesius the Comedian, Martyr |
| Genesius, Bishop of Clermont |
| Genevieve, Virgin, Patroness of Paris |
| Gennadius, Bishop of Astorga |
| Genova Torres Morales, Foundress of the Sisters of the Sacred Heart of Jesus and the Holy Angels |
| Gentien (Gentianus), Missionary Martyred near Amiens |
| George Beesley, English Secular Priest, Martyr |
| George of Suelli, Sardinian Bishop |
| George of Vabres, Bishop of Lodeve |
| George, Bishop of Antioch |
| George, Bishop of Lesbos |
| George, Patriarch of Antioch |
| George, Soldier and Martyr |
| George, Soldier and Martyr |
| Georges Darboy, Archbishop of Paris, Martyred by the Paris Commune May 24, 1871 |
| Georgia of Auvergne, Recluse |
| Gerald (Géraud), Count of Aurillac |
| Gerald, Bishop of Bezier |
| Gerald, Bishop of Ostia |
| Gerard (Gellert) Sagredo of Csanád, Bishop and Martyr |
| Gerard Cagnoli, Franciscan in Sicily |
| Gerard de Clairvaux, Cistercian monk, brother of St. Bernard of Claivaux |
| Gerard Majella, Redemptorist Brother |
| Gerard of Namur, Abbot of Brogne |
| Gerard Thom, Founder of the Knights Hospitaller of St. John of Jerusalem |
| Gerard, Bishop of Potenza |
| Gerard, Bishop of Toul |
| Gereon, Soldier and Martyr |
| Gerlac of Valkenberg, Dutch Hermit |
| Germain (Germanus), Bishop of Auxerre |
| Germain (Germanus), Bishop of Paris |
| Germaine Cousin of Pibrac, Virgin |
| German of Solovki, Russian Hegumen |
| Germanicus of Smyrna, Boy Martyr |
| Germanus, Bishop of Capua |
| Germanus, Patriarch of Constantinople |
| Germerius, Bishop of Toulouse |
| Gerold, 15th Abbot of Fontanelle, Bishop of Evreux |
| Gerold, Bishop of Evreux |
| Geronicus, Bishop of Fiesole |
| Gertrude the Great, Benedictine Mystic |
| Gertrude, Abbess of Nivelles |
| Gerulph, Boy Martyred near Ghent |
| Geruntius, Bishop of Italica, Spain |
| Gervase, Martyr |
| Getulius of Rome, Husband of St. Symphorosa, Martyr |
| Ghislain, Confessor |
| Giacomo Aleman |
| Giacomo Bianconi, Dominican Priest |
| Gianna Beretta Molla, Mother and Pediatrician |
| Gibiltruda, Nun at Faremoutier Abbey |
| Gilbert of Sempringham, Priest and Founder of the Gilbertines |
| Gilbert, Bishop of Meaux |
| Gilbert, Norbertine Abbot of Neuffontaines |
| Gildard, Bishop of Rouen |
| Gildas the Wise, English Abbot and Writer |
| Gilduin, Bishop of Dol |
| Giles (Aegidio) Maria of St. Joseph, Capuchin brother |
| Giles (Aegidius) of Assisi, 3rd Disciple of St. Francis |
| Giles (Aegidius) the Hermit, Confessor, one of the Fourteen Holy Helpers |
| Giordano (Jordan), Confessor |
| Giovanni Fornasini of Bologna, Italian priest martyred by the Nazis |
| Girald (Giraud), Martyred at Fontenelle |
| Girolamo (Jerome) Savonarola, Dominican Priest, Burned at the Stake in Florence |
| Giuliano of S. Agostino, Franciscan |
| Giuseppe Fasinetti, Priest, Founder of the Sons of Holy Mary Immaculate |
| Giuseppe (Joseph) Nascimbene, Priest from Verona, co-founder of the Little Sisters of the Holy Family |
| Gladys, Welsh Princess, Mother of St. Cadoc |
| Gleb, Prince of Kiev, Martyr |
| Glicerio Landriani, Piarist Priest |
| Glyceria of Heraclea, Virgin and Martyr |
| Goar of Aquitaine, Priest, Hermit |
| Goar of Nantes, Bishop and Martyr |
| Gobain, Irish Benedictine Missionary to France, Martyred Hermit |
| Gobnait (Gobnata, Deborah, Abigail) Abbess of Ballyvourney, Ireland, patroness of bees |
| Godefridus (Godfrey), Bishop of Amiens |
| Godehard (Gottard), bishop of Hildesheim |
| Gondulph, Bishop of Bourges |
| Gonzalvus, Bishop of Coimbra |
| Gordianus of Rome, Martyr |
| Gorgonia, sister of Gregory of Nazianzus |
| Gorgonius of Nicomedia, Martyr |
| Gorgonius of Rome, Martyr |
| Gosbert (Drogo), 3rd Bishop of Osnabruck |
| Gottfried (Godfrey) of Kappenberg, Norbertine Priest |
| Gouriaz of Kazan |
| Gracilianus of Faleria, Martyr |
| Grata, Martyr |
| Grata of Bergamo, Matron |
| Gratianus, Martyr |
| Gratus, Bishop of Aosta |
| Gregorio Grassi, Franciscan Missionary Bishop, Martyred in China |
| Gregory Barbarigo, First Bishop of Bergamo, Cardinal Bishop of Padua |
| Gregory Celli, Augustinian Priest and Confessor |
| Gregory I (the Great) Pope and Father of the Church |
| Gregory II, Pope |
| Gregory of Narek, Armenian Monk, Mystical Poet and Hymn Writer |
| Gregory of Nazianzus, Patriarch of Constantinople and Father of the Church |
| Gregory of Nyssa, Bishop and Father of the Church |
| Gregory of Spoleto, Priest and Martyr |
| Gregory Palamas, Archbishop of Thessaloniki |
| Gregory Thaumaturgos (the Wonder Worker), Bishop of Neocaesarea in Pontus |
| Gregory the Illuminator, Bishop and Missionary to Armenia |
| Gregory X, Pope |
| Gregory, Bishop (of Langres, or perhaps of Tours) |
| Gregory, Bishop of Tours, Historian of the Church of Gaul |
| Grimoaldo of the Purification (born Ferdinando Santamaria), Passionist Religious |
| Grimonia (Germana, Germaine), Irish virgin, martyred near Soissons, France |
| Gualfardo of Verona, (Wolfhard of Augsburg), Hermit |
| Gualterius (Gautier, Walter) Abbot of Pontoise |
| Gualterus (Walter) of Servigliano, Abbot |
| Guarinus (Warren), Bishop of Palestrina |
| Gudena of Carthage, Martyr |
| Gudula, Virgin, Patroness of Brussels |
| Gudwall, Welsh Bishop of St. Malo |
| Guibert, Benedictine Abbot of Gorze and of Gembloux |
| Guido Maria Conforti, Archbishop of Ravenna, Bishop of Parma, Founded the Xaverians |
| Guido, Bishop of Aqui in Monferrat, Liguria |
| Gummar (Guntmar), Knight, Founder of Lierre Monastery |
| Gundelind, (Gwendolyn) Abbess of Niedermünster |
| Gundulph, Bishop of Metz |
| Guntrum I, King of the Franks |
| Guy de Fontgalland, “Angel of the Eucharist” |
| Guy of Anderlecht, Confessor |
