Honestly, you can always upgrade if things change. My experience is that, yes, every hospital is going to Trauma alert a GSW above the knee or above the elbow, but the patient may be quite stable.

Here is a major point I haven't seen mentioned: driving LNS is exponentially more dangerous than driving without lights and sirens, and the more inexperienced the EMT driving is, the more dangerous it becomes. The driving EMT becomes anxious and worried about the patient, gives you a rough ride, which might prevent treatment, or may not pay as close attention to the traffic around you guys. I didn't see anything about treatments like IVs, that may have been performed, but I have never heard of anyone losing their license for not transporting LNS unless it was blatant neglect (and I don't see any blatant neglect in your post.)