What is Lineage OS?
Lineage OS is based on the Android Open Source Project with extra contributions from many people within the Android community. It can be used without any need to have any Google application installed. Linked below is a package that has come from another Android project that restores the Google parts. Lineage OS does still include various hardware-specific code, which is also slowly being open-sourced anyway.
Install the Custom ROM Lineage OS 14.1 on Gionee S Plus which is based on Android 7.1.2 Nougat. If you want to try this ROM, then please download and follow the guide on How To Install Lineage OS 14.1 on Gionee S Plus (Android 7.1.2 Nougat). By using TWRP Recovery, you can install the Lineage OS 14.1 on Gionee S Plus (Android 7.1.2 Nougat).