Well, Gskill took over in all regards: highest performing kits, speed records, highest usage rates at the bot. The GTX-series were quite good, except for that last one (GTX8) which was (in my opinion) a blemish on the GTX-brand with poor clocks on all platforms except for Ivy.
Not sure if they gave up; I reckon they just moved to other markets. They do have a good gaming gear line-up tbh.