It's my understanding that units with 0-0 speed (also shown as -- in the mobile version of army builder) will not move as a result of Guts due to the General Movement Rules (since the maximum movement distance is always limited by the users MOV value). There is a question, though, as whether or not such 0-0 units, the Imetrons and Netrods in particular, go prone as a result of Guts. The general rules of movement state: MOV values indicate the maximum distance the unit can move, but there is no minimum. Troopers do not have to exhaust their movement when they declare Move. The fact that there is no minimum would seem to indicate that a 0-0 unit does get a Guts move, albeit a move of 0, and since it has made this move, it can go prone. This seems potentially wrong, except that I can't really find anything RAW that would prevent it. The only notable thing that might as far as I can tell is the way that the mobile version of Army builder displays 0-0 Movement... Here's how it looks in the website army builder: But here it is in the mobile: To me, an actual blank -- MOV implies that the unit literally cannot perform any skill that utilizes MOV, whereas 0-0 leaves some room for interpretation. I presume the general consensus is no going prone but I have heard people say they do it.