Modified Gq-moments have been employed to study multifractal behavior of multiplicity fluctuations in 28 Si-AgBr collisions at 14.6 AGeV. The connection between the Gq-moments and the normalized factorial moments Fq has also been investigated. Power law dependences of the moments on the number of bins M have been observed in the data. The generalized dimensions Dq and the multifractal specific heat for our data have also been determined.