Gapps, short for Google Apps, are a set of applications developed by Google that are commonly installed on Android devices. These applications provide a range of services, including Google Search, Google Maps, Gmail, Google Drive, and the Google Play Store, among others.
Official security updates for Marshmallow ended in 2018. While GApps keeps the updated, it cannot patch the underlying OS vulnerabilities. gapps android 6.0.1
If you boot the ROM first, the initial setup occurs. Flashing GApps after that first boot can cause the Setup Wizard to clash, leading to a "black screen with a status bar." Gapps, short for Google Apps, are a set