If Gearset could authorize the DevHub using a JWT (requires DevHub to have a Connected App and Gearset to be given the clientId + server.key + username) ...

Then:
* Scratch orgs created by Gearset could be accessible to any other machine provided that machine is using the sfdx force:auth:jwt:grant command (same clientId, server.key, test.salesforce.com, and username of scratchOrg)
* This is a prerequisite to any outgoing webhook that wants to auth against the CI scratch org
* This is a convenience feature to IDE users who want to auth against a Gearset-created scratch org without having to get a password setup