And these are novels by Wizards of the Coast, or something else?
A bit of both. Gord is a mixed bag, BG series straight WoTC.
The first few Gord novels (Saga of Old City, Night Arrant, Artifact of Evil) were written by Gary Gygax when he was still at TSR. After the TSR/Gygax split in 1985 he wrote 4 more which were published by New Infinities Productions. The saga was set in the World of Greyhawk.
The Baldur's Gate/Shadows Amn/Throne were published by Wizards in '99-'01. Set in the Forgotten Realms and so on, but you know that. Mention that you liked the (novel) series on a BG gaming site and you may walk out alive - but no guarantees.
As an addendum for clarity, the third series mentioned in the prior threads was by Rose Estes - the Master Wolf..uh...novels. Some people hold this up as 'what killed the Greyhawk setting'. At that point the FR setting was appearing, and while the FR novels were not brilliant, they didn't begin to touch the Wolf novels in awfulness, and combined with the politics of the time (TSR's financial problems, the TSR/Gygax split, etc) Greyhawk was pushed into the bin.
Wether this is factually true or not I do not know, but I dont want to think about them (the novels) too hard so I'll just pop this link in instead about the books- The Oerth Journal