As nouns the difference between gally and pantry

is that gally is while pantry is a small room, closet, or cabinet usually located in or near the kitchen, dedicated to food storage and/or storing kitchenware since the pantry is not typically temperature-controlled (unlike a refrigerator or root cellar), the foods stored in a pantry are usually shelf-stable staples such as grains, flours, and preserved foods.

As an adjective gally

is like gall; bitter as gall.

As a verb gally

is (obsolete|uk|dialect) to frighten; to worry.