King's Gambit Collection PGN FIle
I might as well give this a plug from my blog, too. As part of a forum discussion, I just made available a PGN file I put together of King's Gambit games played by top players as White. The collection is 935 games from 25 players, and the game dates range from 1828 to 2007.
When I started putting this together I was interested mainly in the games from some of the old masters, but as I went along I decided to include some of the more recent players who have played at least a few games with the KG, including David Bronstein and Joseph Gallagher, who are probably the two top proponents of the KG in the past 60 years or so. Alexei Federov has played the KG fairly frequently, too.
Anyway, here's the link to the download page, and just below that is a summary of the games I included in the collection.