Just about any GDKP below AQ40 will take fresh faced green geared people with a smattering of 5man pieces.
Why is a new player trying to gear up for Naxxramas quickly and expecting to do so on their own? It is the final raid out of multiple with pretty strict gear requirements, consumable requirements (with these being higher the lower skill/gear you are), and play requirements. You need to spend some time in the 5mans and lower tier raids if you want to go kill Noth and Patchwerk and Loatheb and Kel’thuzad.
What an absurd notion. Go spend a month, a mere little month, doing other raids and 5mans, getting yourself geared up.
Yes, in Vanilla WoW and prior in any DKP system that was purely bid. The reason people moved away from those systems is because people would hoard points, refuse to bid on items that weren’t the best of upgrades, and the points could only help you within that guild and that guild alone, forcing people to stick with terrible guilds for fear of dropping out of any gear priority entirely.
GDKP has the bidding risk/reward built into it, but the “points” are actual gold that get redistributed to the rest of the raid. Further, you can earn your gold in other ways and in other raids and it still has value in your present run, so you have loads more control over what you can bid on and why.
GDKPs are vastly superior to the old standard DKP systems.