[ArchiMage]

да , ты прав
wikipedia

The GPL grants the recipients of a computer program the following rights:

the right to run the program, for any desired purpose.
the right to study how the program works, and modify it. (Access to the source code is a precondition for this)
the right to redistribute copies.
the right to improve the program, and release the improvements to the public. (Access to the source code is a precondition for this)