The CfgGroups for independent is "Indep" instead of "Guer".
There is currently not one single command in game that returns "Indep" as the side of independent units, commands returning the side of a unit it will always result in "GUER" if the unit is of the Independent side.
Blufor units will always return WEST, Opfor units will always return EAST.
Independent will always return GUER.