We present potential energy curves calculated at the CCSD(T) level of theory for Ga+-RG and In+-RG complexes (RG = He-Rn). Spectroscopic parameters have been derived from these potentials and compared to previously calculated parameters for the Al+-RG and Tl+-RG complexes. Additionally, for some cases, we compare these parameters with those obtained from electronic spectroscopic studies on excited states of the neutral species, arising from atomic-based d <- p excitations. The Ga+-RG and In+-RG potentials have also been used to calculate the transport coefficients for M+ traveling through a bath of RG atoms.