GITS is largely post-cyberpunk, but dips into cyberpunk for ideas. Mostly for it's antagonists. The cyberpunk driver of the post-cyberpunk tank being an interesting take on things, at least.
Clarification for those who don't know. Cyberpunk spun off of a bunch of genres that call themselves $name-punk but ironically ignore the -punk aspect and just replace $name for the name of the technology they replaced magic with in what's otherwise a fantasy story. (Including literally magic as technology.) Because cyberpunk was taken, the cyber version of $name-punk ended up being called post-cyberpunk instead of cyber-steampunk for whatever reason.
Clarification for those who don't know. Cyberpunk spun off of a bunch of genres that call themselves $name-punk but ironically ignore the -punk aspect and just replace $name for the name of the technology they replaced magic with in what's otherwise a fantasy story. (Including literally magic as technology.) Because cyberpunk was taken, the cyber version of $name-punk ended up being called post-cyberpunk instead of cyber-steampunk for whatever reason.