How Do I Participate in A GSA Auction Auction Support October 15, 2018 20:58 Updated Follow Registration is required through GSA. You can register here. To participate you must follow the GSA terms and conditions. Related articles Can the public buy vehicles online? Is there a fee for buying online? What is the fee for purchasing online? Do I have to have Auction Access to Register? Can I bring my children? Comments 0 comments Please sign in to leave a comment.