Here's the Ravelry forum thread devoted to the GAL,
and here's the announcement from that thread:
The Indie Design Gift-A-Long is a 6-week-long KAL/CAL of holiday gifts made from patterns designed by hundreds of independent designers. From Nov. 22. at 8 p.m. (US-EST) through Nov. 30. at 11:59 p.m (US-EST) these indie designers will be discounting between 5 - 20 of their patterns 25 percent for this event.
There are eight KAL/CALs to participate in, prizes of all sorts given out, games, and generally a lot of fun! The Gift-A-Long KAL/CALs will run from Nov. 22 at 8p.m. US EST through Dec. 31 at 11:59 p.m US EST. All patterns by the participating designers are eligible for the KAL/CALs and all not-free patterns by the participating designers are eligible to win prizes.