Can I Use GPL License Library In Commercial Software?
ANSWER: You can if you want to. You don't have to. You could modify it, but when you distribute your application you are obliged to make your source available and also the source for the modifications you made to the library.
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 ...
SaaS companies are more free to use GPL licensed-code because the obligations of the GPL are triggered upon software distribution and SaaS software by nature is not distributed. (This is often referred to as the GPL “SaaS loophole.”) ... The other “license type” that SaaS companies should watch out for is no license.
Are SaaS companies immune to open source risk? | Synopsys
Does using a GPL library in commercial software?
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.
GNU General Public License - Wikipedia