Hello Wurger,
Are you sure the G-10 ([5F]Black 12) is not an R-5? I though all G-10 recon would be R-5 (no MG131's). R2 would indicate either 4 x 23kg bomb, 4 x 50kg bomb, or 2 x Wfr.Gr.21 Mortars. I am unaware of any 'normal' G-10 with Nahaufklärungs gruppe 14. If there were, it would not carry the prefix iirc.
According to Kagero book about Bf109G/K and another one of another publisher the plane was G-10/R2. The R2 variant had no MG131s mounted and was equipped with Rb 50/30 or Rb 75/30 camera. But it might be just a typo.