The "get go" is an informal way of referring to the beginning or start of something. While there are no direct antonyms for this phrase, there are several alternatives that can be used in its place. For instance, words like "end," "stop," or "conclusion" can be used to indicate the opposite of a get-go moment. Alternatively, expressions like "midway point," "intermission," or "halfway mark" can be used to indicate a middle point in a process or journey. Regardless of the word or phrase used, it is essential to choose something that can clearly communicate the intended meaning to the reader or listener.