Is GPL Free For Commercial Use?
Software under the GPL may be run for all purposes, including commercial purposes and even as a tool for creating proprietary software, such as when using GPL-licensed compilers. Users or companies who distribute GPL-licensed works (e.g. software), may charge a fee for copies or give them free of charge.
In general terms, if you use GPL-licensed code in your program that you wish to distribute to others, then you must also license your program under the GPL. ... This has implications for proprietary and/or commercial software developers, as many popular and important libraries are licensed under the GPL.
Using GPL code in your software: the essentials - Clendons
The GPL just says a person with the binary can request source. So if only the people with the binary are in the company then only they can request source. There is no field of use restriction in the GPLv2 - users are free to use if however they like, including for commercial purposes.
GNU General Public License (v2): can a company use the licensed ...
GPL is enforceable as it's essentially a copyright license. The copyright holders of the GPL software can choose to enforce the GPL on the distributed or derivative works of the software. For example, the FSF holds the copyrights on many pieces of the GNU system, such as the GNU Compiler Collection.
Top 10 GPL License Questions Answered - WhiteSource
The GPL is a free software license, and therefore it permits people to use and even redistribute the software without being required to pay anyone a fee for doing so. You can charge people a fee to get a copy from you.
Frequently Asked Questions about the GNU Licenses