Ginga: Nagareboshi Gin
The GNG figures are small unpainted figures with various colors. The first set of figures had small and large sizes (plus a medium Gin), and the second set only had small sizes. The small figures came from Gashapon machines, while the rest were in blind boxes with candy. For reference, small figures have ©T/S T•T B on them and the rest have ©T/S T•T.
Ginga Densetsu Weed
The GDW figures are painted figures with bases. The were released in two sets of blind boxes. The first set are the main characters plus a special "crystal" version of Weed. The second set includes villians, GNG characters, and a few others.
Vinyl Figures (Sofubi)
The first ones were created by RedShark using the same base, but repainted for each character. There is a generic clear version which was available for worldwide purchase, and painted versions which debuted at Wonderfest Summer 2019 and continue to be released.
A new sofubi was created by K Productions and features a more detailed Gin!
Garage kits are unpainted DIY figures. There are three figures that are considered official, thanks to a Wonderfest "one-day copyright": Weed, Orion, and Yamato. These figures can be painted however you'd like.