A novel inbred maize line designated PH7GD and seed, plants and plant parts thereof. Methods for producing a maize plant that comprise crossing inbred maize line PH7GD with another maize plant. Methods for producing a maize plant containing in its genetic material one or more traits introgressed into PH7GD through backcross conversion and/or transformation, and to the maize seed, plant and plant part produced thereby. Hybrid maize seed, plant or plant part produced by crossing the inbred line PH7GD or an introgressed trait conversion of PH7GD with another maize line. Inbred maize lines derived from inbred maize line PH7GD, methods for producing other inbred maize lines derived from inbred maize line PH7GD and the inbred maize lines and their parts derived by the use of those methods.