Packet Editing and VAC?

Just out of curiosity, is it possible to use a packet editor on Garry's Mod? I wasn't sure if VAC would ban me or not and I'd rather not get banned from Garry's Mod completely. Thanks in advance for any answers!

A simple google search would have answered this question.

Kinda already Googled it and didn't find any answers. Also I'd rather go to a place where people know what they are talking about.