You can’t use GNOME in your app name, see GNOME’s Software Policy:
Only official GNOME software is permitted to use the GNOME trademarks (either the logo or word “GNOME”) to refer to itself
You also might want to check the GNOME HIG and the Flathub quality guidelines:
Likewise, a good name should avoid:
…
- Non-standard punctuation or whitespace (for example: SuperWriter).