English: General Permitted Development Order 
Welsh: Gorchymyn Datblygu Cyffredinol a Ganiateir
Subject: Cynllunio
English definition: GPDO. The Town and Country Planning (General Permitted Development) Order 1995 grants rights (known as permitted development rights) to carry out certain limited forms of development without the need to make an application for planning permission.
Welsh definition: Mae'r Gorchymyn Cynllunio Gwlad a Thref (Datblygu Cyffredinol a Ganiateir) 1995 yn rhoi hawliau (a adwaenir yn hawliau datblygu a ganiateir) i wneud rhai ffurfiau cyfyngedig o ddatblygiad heb orfod gwneud cais am ganiatâd cynllunio.