Lack of reproducibility harms molecular devices integration into genuine circuits. Thus, incorporating operando characterization will help to understand multiples features producing disparities. In this work, we report an hybrid molecular graphene field effect transistor (m-GFET) made with 11-(Ferrocenyl)undecanethiol (FcC11SH) and high-quality graphene (Gr) in a back-gated Field Effect Transistor configuration. On the one hand, Gr enables redox electron transfer, avoids molecular degradation and permits operando spectroscopy. On the other hand, molecular electrode decoration shifts the Gr Dirac point (VDP) to neutrality and introduce an extra function. Remarkably, photoconductance appears at the Gr electron conduction regime. As follows, we benefit from these heterogenous electrical and optical inputs to handle the m-GFET as AND/OR logic function. Proofs presented here illustrate a large step forward in the field of molecular scale electronics with implications in sensing and computing.