I didn't think anything about it, because this is not a new concept... however, what caught my attention was the fact that it looked similarly (elastic beams, etc), behaved similarly and even the names were really really close to one another:
Grab-itron VS Graviton
So, either way, I tested it out and made a video about it today:
NOTE: This is NOT to say that Epic Games "stole" or was in any way inspired by this weapon in particular, not at all.
Despite the fact that Epic knew about the mod, given that 9 years passed since it was first released I doubt that they even remember the mod at all.
It's far more likely, to me at least, that they just had a very similar idea 9 years later independently, maybe even inspired by another weapon (like the HL2's Gravity Gun, which in a way played a role as an inspiration for this weapon as well), and personally I very much like their take on this kind of weapon.
Again, not an entirely new concept, it's just that the similarities between the two were too noticeable for me to ignore, so I felt like doing this video showing as much, that's all.
Either way, have fun watching.