Subset of the parameters describing the GG Tau A orbit: semi-major axis (a), eccentricity (e), and misalignment angle relative to the circumtriple ring (Δθ). In both panels, the blue colour map represent the MCMC posteriors, whereas red dots indicate solutions with ${\chi }^2-{\chi }_{\text{min}}^2\le 1$ identified by the least squares fit. The red cross is the highest-likelihood model from the MCMC chain and the yellow diamonds are the ‘coplanar’ and ‘misaligned’ solutions used in the hydrodynamical simulations of Sect. 4.