About License of VIM3 NPU TOOLKIT Ver.

Dear Technical Support Team,

Recently,Khadas infoms VIM3 users of the version update (e.g., version of VIM3 NPU TOOLKIT. It’s weird. When I check the LICENSE file from “aml_npu_sdk_6.4.0.10.tgz” file, the file describes the GNU GPLV2. Is it right? I thought that the file would be Apache license in order that application developers may not open the application source codes that are linked by libraries of aml_npu_sdk_6.4.0.10.tgz. file. Is the "aml_npu_sdk_6.4.0.10.tgz’ file the GPL license really?

$ head ./aml_npu_sdk_6.4.0.10/LICENSE -n 10
Version 2, June 1991

Copyright © 1989, 1991 Free Software Foundation, Inc., http://fsf.org/
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.