I think you asked a similar question a few years ago. The Google Mail connector doesn't support sending attachments, but you could do it through a universal HTTP connection. According to Google Mail's REST API, you can upload an attachment as multipart/form-data. Here are some steps you'll need to follow:
- Create an HTTP connection
- Google Mail upload attachments REST API instructions
- Import files into an HTTP destination app
- Upload a file or record as multipart/form-data
If you have any further questions, feel free to comment here or make a separate post in the community! Thanks!