Currently we are using Python 3.7 with SIP 4.19.8 in our builds and both are deprecated.
SIP v4 module is not available for current Python versions, so we will need to upgrade, ideally to v6, but this will likely involve extensive source code changes and testing, since they are not compatible, I am not sure if v5 could be an useful intermediate step.
In the meantime we could build using Python 3.10 including the built from source SIP 4.19.8 module in embedded Python, but users willing to use a separate Python install using our binary builds likely would need to manually copy sip.pyd and sip.pyi from the embedded Python library, since the sip module is not available from PyPI.
For users building GC from source, to use Python 3.10 instead of 3.7 is straightforward and similar to our ci scripts just replacing 37 by 310.
PS: this issues is for tracking purposes, if you have questions or need help, please use this thread in the users forum: https://groups.google.com/g/golden-cheetah-users/c/gZeIzTQVkAQ