Final answer:
The historical identity and background of Luke are not well-documented, so it is uncertain if he was a gentile and a Greek.
Step-by-step explanation:
According to the information provided, it is not possible to definitively determine whether Luke was a gentile and a Greek. Luke is traditionally believed to be one of the four Gospel writers in the New Testament. However, the historical identity and background of Luke are not well-documented. The available information does not explicitly state whether Luke was a gentile or a Greek. Therefore, it is uncertain if the statement 'Luke was probably a gentile and a Greek' is true or false.