@Pinballgamer Have you read this guide? http://wiki.compilgames.net/doku.php/gdevelop5/publishing/android_and_ios
If you have, did you make sure you exported using the online service? AFAIK that’s the only way to produce a signed APK. Review that you’re not using the “advanced” / manual way which would export the files so you would have to use Cordova SDK
If you were doing everything right and it is still spewing a ZIP, I think there was an old issue related to this which was a problem with the renaming… try reading the answers here Android export problem · Issue #886 · 4ian/GDevelop · GitHub
and here:
Maybe @4ian can help more if you are still not getting the results you expect. Good luck!