I need a GB Market Pull-Out Kitchen Faucet Repair Kit. It has started dripping and I want to reseal it. Are all seals and O-rings universal? I went to Home Depot where I purchased my faucet. No help at all, all replacement parts they sell are for Delta, Kohler, or Moen. They don't know if seals and rings are universal. They said to take it apart and bring in what I need and match them to their stock. It's Sunday and I don't want to put my kitchen out of order until I have parts to fix the faucet.

No, not all, but some, are universal. If you can't find the part number for the repair kit, do as they say, remove the cartridge and O rings and bring them to HD. GB is notorious for unavailability of repair parts. Here is an 800#
https://customerservice800phonenumber.com/Customer-Service-Number-of-Glacier-Bay/