What is the difference between normal and grossly normal on a ct scan report? the radiologist listed most of my organs as grossly normal, but a few are just listed as normal.

Same: For all intents and purposes, normal and grossly normal are the same. "Gross" is a medical term that usually means "visible", but has become a sort of medical colloquialism meaning "from what I can see this is --- normal"

They both mean: the structure is normal looking on the scan, Two ways of saying the same thing.

Normal variations: I would interpret that to mean that there might be some minor variations that he/she is seeing on the scan, but those variations are not considered pathologic or harmful, or are a normal variant.

Both are the same: "Normal" means that the organs of reference are completely assessed and show no evidence of abnormality. "Grossly normal" usually means that the organ in question may be better assessed with a different imaging study but shows no evidence of abnormality on the current study. For example, the uterus is best evaluated with ultrasound or MRI but can look "grossly normal" on CT.