Total number of GCs versus the dynamical mass estimate derived from the GCS velocity dispersion and the galaxy effective radius. NGC 1052-DF2 is shown in purple, Local Group dwarfs in green (data from Forbes et al. 2018), Fornax cluster galaxies in pink (data from Fahrion et al. 2020a and Liu et al. 2019), and literature UDGs in orange from the compilation by Gannon et al. (2024). The empty purple circle shows the dynamical mass estimate if GC101 is considered an interloper not belonging to the galaxy.