You can't earn a gally there is no bounty to complete that puts you through tests to find it and earn it by completing them. It is luck all freaking luck as to why people get gally. You got to gorgon chest and open it and hey gally oh rng just landed in it and gave you it. No earning it just luck giving you it. So will people stop with the bullshit I earned my gally from the rng. You were lucky to get an exotic at that exact moment in time and lucky it wasn't shards so shut the hell up and deal with the fact that everyone doesn't earn their gally. Although those that bought it week two without doing the loot cave and legit having the stage coins to buy it are one step ahead of the rest. That's the closet you can come to earning it