High-resolution, high signal to noise, optical spectro-astrometry observations of FU Orionis obtained using the GMOS spectrograph at Gemini-N are presented . Such observations have been previously shown to allow the investigation of outﬂow structure and multiplicity at milli-arcsecond spatial scales. Displacements in the position spectrum for Hα, Na D lines and other spectral lines were studied and the 0.5" companion to FU Ori was detected. Utilizing the technique of Bailey (1998b) and using a optical ﬂux ratios estimated from near-IR observations, the individual optical spectra of the two stars were deconvolved. No indication of outﬂow structure was observed.