| GUN | Gamersunitednetwork (pc-games website) | Gamersunitednetwork（电脑游戏网站） |
| GUN | Generally Unstable Network | 一般不稳定网络 |
| GUN | Gunfighters (gaming organization) | 枪手（游戏组织） |
| GUN | Guardian Units of Nation (Sonic Adventure 2, gaming) | 国家守护单位（Sonic Adventure 2，游戏） |
| GUN | General Usage Network | 通用网络 |
| GUN | Gunnery | 枪械厂 |
| GUN | Gaming Unlimited Network | 游戏无限网络 |
| GUN | Give Up Now | 立即放弃 |
| GUN | Grantor Underwriting Notes | 授予人承销票据 |
| GUN | Guardian Unit of Nations | 国家监护单位 |