The term "gat in line" has a few synonyms that can be used in different contexts. The phrase "queue up" is commonly used in the British English language to refer to lining up in line. "Stand in line" is another common phrase used in American English and means the same thing. "Join the line" is another way of expressing the same thought, as is "get in line." Similarly, "wait your turn" is another synonym that can be used in place of "gat in line" if you want to emphasize the concept of waiting your turn patiently. Regardless of the synonym you use, the meaning stays the same; wait patiently for your turn and follow the line.