| Gazelle | 51 | | No | | |
| Golem | 52 | | No | Blunt | 50% Blunt 75% Mind |
| Ghost Willow | 55 | Undead | No | Blunt | -10% Cut 25% Arrow 50% Nature -10% Body 50% Poison 100% Disease |
| Ghoul | 60 | | No | | 8% Arrow -10% Nature 100% Poison 100% Disease |
| Greater Skeleton | 70 | Undead | No | Cut | -25% Blunt 80% Arrow |
| Ghoul Spectre | 80 | | No | | -10% Soul 100% Disease |
| Greater Kudo | 82 | | No | Blunt | -4% Blunt 10% Cut |
| Goblin War Galleon | 85 | Sea Creature | No | Blunt | |
| Green Salamander | 88 | | No | Cut | 25% Soul 25% Mind |
| General Thrakk | 100 | | Yes | | 50% Blunt 20% Pierce 20% Cut 20% Arrow 20% Magic Missile 20% Nature -10% Soul 20% Body |
| Giant Squid | 100 | Sea Creature | No | | |
| Greater Wyvern | 102 | Wyvern | No | Pierce | 20% Arrow 25% Nature 100% Poison |
| Gorilla Shaman | 105 | | No | | -5% Pierce 10% Nature 25% Mind |
| Giant Killer Whale | 105 | Sea Creature | No | | |
| Ghast | 114 | | No | Soul | -25% Blunt 75% Pierce 75% Cut 60% Soul 50% Mind -10% Body 100% Poison 100% Disease |
| Grasping Tentacles | 114 | | No | Blunt | 20% Blunt 20% Arrow 20% Body 100% Poison 100% Disease |
| Ghoul Lord Yesoth | 115 | | Yes | | 20% Blunt 100% Cut 50% Arrow 100% Poison 100% Disease |
| Guardian of Kuthos | 130 | | No | Blunt | -4% Blunt 30% Pierce 25% Cut 25% Soul 25% Mind |
| Greater Blue Dragon | 140 | Dragon | No | Mind | 50% Pierce 30% Arrow 70% Magic Missile 80% Nature 80% Soul 70% Mind 80% Body |
| Greater Gold Dragon | 140 | Dragon | No | Soul | 40% Cut 30% Arrow 70% Magic Missile 80% Nature 100% Soul 80% Mind 80% Body 100% Poison |