List of legendary creatures (G)
- Gaasyendietha (Seneca) â Dragon
- Gagana (Russian) â Iron-beaked bird with copper talons
- Gaki (Japanese) â Ghosts of especially greedy people
- Gaokerena (Zoroastrianism) - Mythic plant
- Gallu (Mesopotamian) â Underworld demons
- Galtzagorriak (Basque) â Small demonic servants
- Gamayun (Russian) â Prophetic human-headed bird
- Gana (Hindu) â Attendants of Shiva
- Gancanagh (Irish) â Male fairy that seduces human women
- Gandabherunda (Hindu) â Double-headed bird
- Gandharva (Hindu) â Male nature spirits, often depicted as part human, part animal
- Gargouille (French) â Water dragon
- Garkain (Australian Aboriginal) â Flying humanoid who envelops his victims
- Garmr (Norse) â Giant, ravenous hound
- Garuda (Hindu) â Human-eagle hybrid
- Gashadokuro (Japanese) â Giant malevolent skeletons
- Gaueko (Basque) â Wolf capable of walking upright
- Geb (Egyptian) â God of the Earth, married to Nut
- Ged (Heraldic) â The fish pike
- Gegenees (Greek) â Six-armed giant
- Genderuwo (Indonesia) â Ape-like mystery
- Genius loci (Roman) â Spirit that protects a specific place
- German (Slavic) â Male spirit associated with bringing rain and hail
- Geryon (Greek) â Three-headed six-armed giant with three torsos and (in some sources) six legs
- Ghillie Dhu (Scottish) â Tree guardian
- Ghost (Worldwide) â Disembodied spirits of those that have died
- Ghoul (Arabian) â Cannibalistic shapeshifting desert genie often classified as undead.
- Giant (Worldwide) â Immensely large and strong humanoids
- Giant animal (Worldwide) â Unusually large beasts
- Gichi-anami'e-bizhiw (Ojibwa) â Bison-snake-bird-cougar hybrid water spirit
- Gidim (Sumerian) â Ghost
- Gigantes (Greek) â Race of giants that fought the Olympian gods, sometimes depicted with snake-legs
- Gigelorum (Scottish) â Smallest animal
- Girtablilu (Akkadian) â Human-scorpion hybrid
- Gjenganger (Scandinavian) â Corporeal ghost
- Glaistig (Scottish) â Human-goat hybrid
- Glashtyn (Manx) â Malevolent water horse
- Gnome (Alchemy) â Diminutive Earth elemental
- Goblin (Medieval) â Grotesque, mischievous little people
- Gog (English) â Giant protector of London
- Gold-digging ant (Medieval Bestiaries) â Dog-sized ant that digs for gold in sandy areas
- Goldhorn
- Golem (Jewish) â Animated construct
- Gorgades (Medieval Bestiary) â Hairy humanoid
- Gorgon (Greek) â Fanged, snake-haired humanoids that turn anyone who sees them into stone
- GoryÃ
 (Japanese) â Vengeful ghosts, usually of martyrs
- Grassman (Ohio, USA) â Ape-like cryptid
- Gremlin (Folklore) â Creatures that sabotage airplanes
- Griffin (Heraldic) â Lion-eagle hybrid
- Grigori (Christian, Jewish, and Islamic mythology) â Fallen angels, father of Nephilim
- Grim (English and Scandinavian) â Tutelary spirits of churches
- Grim Reaper (Worldwide) â Death angel often thought to be God's/Satan's assistant
- Grindylow (English) â Malevolent water spirit
- Grootslang (South Africa) - Large snake often associated with diamonds
- Gualichu (Mapuche) â Malevolent spirit
- Guardian angel (Christian, Jewish, and Islamic belief) â Subclassification of angels that guard and protect a specific person or living being
- Gud-elim (Akkadian) â Human-bull hybrid
- Guhin (Japanese) â Anthropomorphic bird
- Gui Po (Chinese) â Ghost that manifests as an old woman
- Gui Shu (Chinese) â Ghostly tree that confuses travelers by moving
- Gulon (Germanic) â Gluttonous dog-cat-fox hybrid
- Gumiho (Korean) â Demonic fox with thousands of tails believed to possess an army of spirits and magic in its tails
- Gurangatch (Australian Aboriginal) - An enormous reptile-fish whose movements carved out the landscape south of the Blue Mountains
- Gurumapa (Nepalese) â Child-eating demon
- Gwyllgi (Welsh) â Black dog
- Gwyllion (Welsh) â Malevolent spirit
- Gyascutus (American folklore) â Four-legged herbivore
- Gytrash (Lincolnshire and Yorkshire) â Black dog
- GyÃ
«ki (Japanese) â Bull-headed monster