These are Stat Weights, they are datamined from SimulationCraft Program, Pawn will uses this data along with:
Most popular sites are Pawn and RaidBots, my guild in Wrath Classic use RaidBots.
Here’s a wowhead thread that will step you through to obtain and setup and use SimulationCraft to get your own data and then steps you through how to use Pawn.
You can do the above to get your own stat weights, use pawn to get the export code. Import that code in to Dugi Guides Gear Scoring > Import Scores, paste the import code and then click Apply button, allow the Ui Reload.
I can whip up a proper DugiGuides forum guide to do this for both Wrath Classic and Retail, but my current work load is somewhat high atm and this will be done in my free time.