News from RTX Austin 2019 said that gL is not in development at the moment. RT decided to shift all their gears onto RWBY for the time being and then shift focuses to their other shows (gL and Nomad of Nowhere) when RWBY V7 finishes.
There is no official source for this information, just various tweets from people who went to RTX and heard this. This is the best, fullest account of this news, from a YouTuber I have a lot of respect for: youtube.com/watch?v=qgDq5Lmz2E0&t=414s
So, this does not mean gL is on hiatus or that it "doesn't look like it will come back." It just means that RT Animation does not have any specific time frame on exactly WHEN it will come back.