How to Sign "Gallon"
To sign "gallon," you will fingerspell its common English abbreviation: G-A-L. Hold your dominant hand in front of you and form a "G" handshape, with your thumb and index finger pointing to the side. Next, transition into an "A" handshape, and finally form an "L" handshape with your index finger pointing up and thumb pointing out. Because this is a commonly used abbreviation, the fingerspelling is often very fast. In natural conversation, the "A" might be blended or skipped entirely, making the sign look like a smooth, quick transition from "G" directly to "L".