As it turns out i am also using a testing iso that is set to testing repos that i installed and am using daily.
Host: HP EliteDesk 705 G5 Desktop Mini
Kernel: FreeBSD 15.0-RELEASE-p2
Seems quite stable to me. I'm not sure i would know how to switch to stable repos or when might be a good time to do that... as i am not encountering any issues with it i seem happy enough. I installed the xfce iso and then installed mate and made that the distro officially by removing all the xfce stuff and de-priorotizing the ghostbsd xfce meta packages and priortizing the ghost bsd mate meta ones. Very Pleased!
