Is Press Permit licensed as GPL?

Yes, Press Permit is released under the GPL version 3 license (the same as WordPress).

Purchasing a support key entitles you to receive your initial download from a trusted source (the author), one-click updates and extension installations within your WordPress site admin, plus 12 months of expert support through our convenient ticket system.

A developer support key provides a year of updates to up to 25 installations (no limit to number of networked sites), plus our fond regards.