Google Ads in Electron?

Google AdSense is not allowed in any desktop applications.

From AdSense policy:

Google ads, search boxes or search results may not be:

• Integrated into a software application of any kind, including toolbars.
• Displayed in pop-ups or pop-unders.
• Placed in emails, email programs, or chat programs.
• Obscured by elements on a page.
• Placed on any non-content-based page. (Does not apply to AdSense for search or mobile AdSense for search.)
• Placed on pages published specifically for the purpose of showing ads.
• Placed on pages whose content or URL could confuse users into thinking it is associated with Google due to the misuse of logos,
  trademarks or other brand features.
• Placed on, within or alongside other Google products or services in a manner that violates the policies of that product or service.