LineageOS 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 restore the Google parts. LineageOS does still include various hardware-specific code, which is also slowly being open-sourced anyway.
- CM File manager can not access SD Card (workaround: other file managers can, so you can use another one)
- Battery icon in status bar can't be changed
Source: xda forum
Installing this Lineage will need TWRP recovery for the best result. Please note tjat you will need to wipe all your data stored in your phone storage. This mean you must create nandroid backup with TWRP features beforw you flashing the ROM.
And this action could damage your phone if you don't varefully handle this job. You on your own buddy! Don't blame me anything. Be care.