Can I Use GPL Software On My Website?
You are free to run a GPL-licensed program without having to accept the license. If the GPL'ed program is client-side JavaScript, then you are distributing the GPL'ed code and possibly derivative code to your visitors. You are only allowed to do this in accordance with the GPL.
Can I sell software that uses GPL?
4. Can you sell GPL software/code? Yes, the GPL license allows users to sell the original as well as the modified software. It may be confusing, but free software is referred to as free in terms of freedom and not in terms of price.
GPL License - Top 10 Questions Answered - Mend
Can you use GPL code in proprietary software?
Under the GPL, either static or dynamic linking requires the main program to be distributed under the GPL, with the result that linking a GPL-licensed library is incompatible (in licensing terms) with a proprietary program.
Using GPL code in your software: the essentials - Clendons
GNU General Public License (GPL) is among the most popular open source licenses.
What is GNU General Public License (GNU GPL or GPL)? - TechTarget
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.
GNU General Public License - Wikipedia