Buy Gear Credits at a discount at the IK website, you can buy 150 GC for $134.99, or 200 GC for $159.99. Plus you can use Jam Points for up to 30% of any purchase there.
Then go over to Custom Shop and spend those Gear Credits! 😁
Any qualifying item that you buy in the Custom Shop with Gear Credits, will be reflected in your IK account for Group Buy!