Maltodextrin used to manufacture Plumpy nut is the same as used in infant formulas and is prerpared from corn flour. It does not contain any gluten. I assume it is the same for other RUTF which have maltodextrin among their ingredients.

This is outside of my main areas of expertise but I did look into this (and peanut allergies &c.) when CTC (now CMAM) was contentious and opponents of the CTC model picked on anything they could find to cause trouble. I am not suggesting that your question is motivated by anything other than clinical concerns. Wheat derived maltodextrin is unlikely to contain more than 20mg/kg of gluten and these levels are not considered high enough to be of concern in gluten intolerant individuals (these levels allow products to be labelled "gluten free"). In the EU (ECD 2000/13) maltodextrin from all cereals (including wheat) is exempt from labelling. We might still be concerned about wheat-derived maltodextrin in young and sick children. Maltodextrin used in therapeutic and infant feeding products tends not be be made from wheat (it is usually made from maize) and is gluten free. Using RUTF with this case is not contraindicated.