>>23383291 (OP)It's essentially stand alone
What you see in this webm
>>23383323 this is pretty much the extent of the overt references to previous shows.
You could go ahead and watch it with no problem.
But some heads up: the show is very fast paced and has a chaotic energy.
I fell in love with it and have watched the show several times in an effort to get a full understanding of it, but on a first viewing there is a lot of information thrown at you, plot points, characters, factions, fun idiosyncrasies and it can be a lot to keep in your head (this is also incidentally a theme of the show).
There are two other Tomino-directed things that have a similar chaos, which I can recommend if you feel you want a warm up to the style of storytelling.
Char's Counterattack is chronologically the 4th piece of Gundam media released, but functionally it's a sequel to 0079, bringing Char and Amuro's rivalry to a close.
One of the themes of G-Reco is managing people through government and religion to prevent people from repeating tragedies of the U.C. era, and CCA will give some weight to that theme.
Turn A Gundam is, in the official timeline, chronologically after G-Reco. The idea is that all Gundam stories eventually lead to Turn A, which is meant to be the final word.
This will be a weirder recommend, but I will recommend the first Turn A Gundam compilation movie. It's a recap of the first half of a 50 episode show, and it's edited at a breezy pace similar to G-Reco.
The first movie tells an interesting story, but also leaves plenty of stuff out so it won't replace enjoyment of the Turn A show itself. Serves as a teaser for the full show.
Turn A is more in the spirit of G-Reco than Char's Counterattack. Very light.
And while it's technically the "last" Gundam in the official timeline, G-Reco sort of works as a sequel too.
Turn A will introduce you to ideas and themes that G-Reco builds on.
Neither are necessary to watch to enjoy G-Reco