The race in biomedical diagnostics between optical detection principles and electrical concepts is not decided yet. Both approaches continue to offer solutions for fast, multiplexed, simple and cheap detection of biological relevant molecules. However, if it comes to the detection of small analytes and/or if the achievable analyte binding density at the transducer surface is low, label-free optical detection schemes have a problem because the change in the optical interfacial architecture induced by the mere binding of the analyte may be simply too minute to be detected. In this work, an innovative and versatile sensing platform, combining an electrical and optical read-out device to compare the different signal behaviors during a biological binding event in real time was developed. It is based in coupling the read out of a graphene-based field-effect transistor (gFET) with that of surface plasmon resonance (SPR). Various binding events including biotin/neutravidin, PNA/DNA and ssRNA/ssDNA aptamers for protein detection were investigated and the results discussed.