The nameValueList variable is only specifically used in a small set of areas within the Gateway's setup (i.e. GSE) and are used to replace sections in the GSE similar to the data they contain.
For example, the Name value list can be used in the rmc-interface plugin when setting the applications data, as that uses data in name value pairs. (rmc-interface sampler > Advanced tab > Applications > var)
You cannot use these variables within rules as there is no way to access this data unfortunately. Perhaps, you can try the stringList variable.