The process does not require root access. Follow these steps for a successful installation:
While the TTA GApp Installer is effective for many, it's not the only option. Depending on your specific device and how comfortable you are with advanced Android customization, you may want to consider these alternatives: tta pie gapp installer for android 9 link
Knowing this will allow me to provide more precise troubleshooting steps if you encounter issues. The Gapps Installer - Browse /Pie (9) at SourceForge.net The process does not require root access
GApps packages are not one-size-fits-all. You must know your phone’s processor architecture before looking for a download link. The Gapps Installer - Browse /Pie (9) at SourceForge
To help troubleshoot or find alternative download mirrors, could you share the you are using? Also, let me know the specific custom ROM name so I can verify any unique installation steps required for your device. Share public link
You must have a custom recovery installed, such as TWRP (Team Win Recovery Project), OrangeFox, or PitchBlack Recovery.