After installing BiTGApps and successfully booting into system, there is no need to flash new BiTGApps update on top of it. Just don't OK! You are supposed to install it only once and whenever you update within the same ROM, OTA Survival will take care of Google Apps. Unlike stock rom, they booted once with whatever Google Apps and nobody is re-flashing them by any means.
Flash new BiTGApps, when switching to different ROM or its a clean flash, Go brrrrrr.
>>Click here to continue<<