I'm on the edge for the Divinity Bundle, but I want to check into how GOG handles game updates before I buy it.

Do they release individual patches, or am I going to be stuck downloading full games again should they update?

For most recent releases they've been releasing standalone patches as small .exe's.

Probably depends on the game. Full installer for Legend of Grimrock was replaced several days ago.

Yeah, I would say it depends on what the developer gives them.

FTL has been getting tiny universal patches (I'm assuming universal in this case means you only need the game and the latest patch).

Thanks for the answers, guys. :)