Ext JS 4.1.1a is available under the GPLv3 as can we see on downloads page.
Version 4.1.3 is available to Sencha Support subscribers only.
What about ExtJS 4.1.3 availability under the GPLv3? This will be done but later or it will never be done.
And what we should wait for version 4.2?
Ext JS Product Lifecycle page looks like all versions have GPLv3 support