  In the family grand unification models (fGUTs), we propose that gauge U(1)'s
beyond the minimal GUT gauge group are family gauge symmetries. For the
symmetry $L_\mu-L_\tau$, i.e. $Q_{2}-Q_{3}$ in our case, to be useful for the
LHC anomaly, we discuss an SU(9) fGUT and also present an example in Georgi's
SU(11) fGUT.
