What has GAIA found out about the dwarf galaxy heritage of stars in the Milky Way, if anything?
Malhan et al. (2018) summarise progress so far (the Gaia astrometry is improving all the time as more data are collected) using Gaia DR2 data. In particular they produce "panoramic maps" of streams in the Galaxy halo, which I believe is exactly what you are looking for (see below).


Coherent tangential velocity structures, a.k.a. "streams", seen in the southern Galactic hemisphere by Gaia DR2 - from Malhan et al. (2018).