Are the names ( medical officer, medical doctor and general practitioner are synonymous or different)?

I have the same question medical officer and general practical As I understand GP is a senior (chronic) medical office in Sudan A medical doctor is a physician in internal medicine (senior registrar or specialist consultant) The medical officer is a house officer get full Registration of Sudan medical council

Always you have to listen to his needs 1st

In Sudan the names medical officer is the same as medical doctor, which are doctor who did their houseman-ship and passed permanent registration exam, But GP is not commonly used.