GE GXULQ Undersink Water Filter System – Overview – The GE GXULQ is designed to filter the cold water to your existing faucet. No additional faucet required or sink holes to drill. It features GE’s proprietary Twist -n- Lock quick change filter cartridge. It also includes a convenient magnetic filter change indicator light you can put on your fridge. The GE GXULQ water filter reduces cysts, chlorine taste & odor, turbidity, and sediment.