Global Services eXchange is the "supply chain" back end for AASPs & SSAs - both are for "companies" not individuals
https://www.apple.com/support/programs/
https://www.apple.com/support/programs/ssa/
...
To Apply
For consideration in the SSA program, you will need to complete a pre-application assessment. Apple will use the information provided to determine whether your organization qualifies for authorization as a Self-Servicing Account Provider.
from > http://salesresources.apple.com/cp/channel/channel_update.html
Thank you for your interest in the Apple Channel Programs.
Apple is not currently accepting reseller or service provider applications. Please check the Apple Channel Programs page periodically for new information.