My point is that based on the video we can't tell that it's the same effective against ATGMs.Although we don't know what's the maximum speed of interception of the GL6 APS is, we do have an idea of what western APS systems are capable of. For example, Iron Fist has under testing conditions, been able to intercept a 120mm APFSDS. The highest of the bunch here, the Vikhr maxes at 600m/s. Even being conservative, GL6 should be easily able to intercept such threat.
What I'm more interested in, is if such a system has a minimum interception speed. An FPV drone with a rpg warhead attached is far far slower than a RPG-7. I wonder if GL6 has the capability to intercept slower FPV and or loitering munitions.
About the western APSs, there are a lot of different systems, some of them has shown efectivnes against the ATGMs (turkish Pulat, Israely Trophy).