I wouldn't be surprised if it alternated with RWBY. Basically, RWBY airs October through January, so it would make sense if Gen:Lock aired in the spring/summer so the animation team only needs to focus on one at a time.
Gray Haddock and Koen Wooten brought Gen:Lock up in the newest Rooster Teeth Burnie Vlog in terms of their resolutions for 2018. Gray still says the writing needs to get done though. So it probably won't even air this year for all we know.