As a modded OS from a third-party developer, it is not officially supported by Microsoft. While some reviewers find it safe, there is always an inherent risk of hidden scripts or lack of official security patches.
This is the million-dollar question. Because Ghost Spectre is an unofficial, modified ISO, you are trusting a third-party modder with your system. Here’s an honest breakdown of risks versus safety measures. windows 10 32 bit ghost spectre