"Have you gone?" is a way to ask if someone has left or is no longer present. It is a present perfect tense construction using the auxipary verb "have" and the past participle of the main verb "go."
Here are some example sentences:
"Have you gone to the store yet?" (你去商店了吗？)
"I haven't gone anywhere today." (今天我没有去任何地方。)
"She has gone to work already." (她已经去上班了。)
The present perfect tense is used to talk about actions or events that started in the past and continue up until the present or have recently been completed. It is formed with the auxipary verb "have" or "has" and the past participle of the main verb. It is often used with time expressions such as "today," "this week," or "since."