[BHB2007]-1 is an accreting young stellar object which is surrounded by a protoplanetary disk with an enormous gap (~70 au wide). This cavity might have been carved by a very young brown dwarf candidate present at a distance of 0''.32. To date, the presence of this candidate has only been detected in the radio (VLA) and NACO's L' filter, limiting to constrain the mass accurately. We have GRAVITY observing time to extract the K-band spectrum of the companion candidate for the first time. We aim to constrain the dynamical mass of the companion, characterize it with atmospheric models and perform high-precision astrometry to constrain its position. A successful observation would confirm the presence of the brown dwarf companion candidate. Additionally, we also would be able to observe the circumplanetary environment with a much higher resolution compared to the previous observations.