The correct spelling of the phrase "gat on good side of" is "get on the good side of". The word "get" is pronounced as /ɡɛt/ and refers to the act of receiving or obtaining something. The phrase means to improve one's relationship with someone or a group of people. The word "good" is pronounced as /ɡʊd/ and refers to something that is favorable or satisfactory. By getting on the good side of someone, one can improve their chances of success or positive outcomes in various situations.