[davegirdy2]

I'm still confused with the term GP. Shouldn't it be OP?

[abdullahkhalids]

GP means grandparent. It refers to the comment exactly two up.

Ex. From my comment, GP is the comment by pynappo, starting with "i think the GP was talking... "

Similarly, you can have GGP for great-grand parent, etc.

OP refers either to the starter of the post or the top level comment.

[zargon]

The OP would be the geenspun.com post or cute_boi, depending on context. The grandparent, in this case, is aslilac.

[numpad0]

It's always GP in this subreddit.