If you're talking about using GPL software in-house, that's perfectly fine. The GPL only requires you make changes available to those that you distribute the software to. So if you download GPL software, make changes to it or integrate it into your own program, and then you keep all that strictly in-house (only your own company employees can see it and use it), that's not a GPL violation, and you don't have to give your changes (or other software linked to it) to anyone outside the company.