All BYOD need to be 1st activate on GSM before a CDMA SIM card will work,
The CDMA SIM card from a Moto X Pure [cSIM] can not be used on a Moto G5S Plus [needs an ISIM]
Note changing phones by swapping SIMs is a GSM feature.
Republic Wireless SIM Card Kit | Republic Wireless [currently $5 +shipping (minimum$4)]
Once activated on GSM one can request a CDMA SIM card from Republic support
How to Request a 3.0 CDMA SIM Card – Republic Help
One needs to buy the BYOD SIM card after that if CDMA is need support will send it out at no additional charge