Hi Dusan,
In GWD, we have provided three Publish options: Publish Locally, Publish to Google Drive and Publish to DoubleClick Studio. So it is possible for you to upload to Google Drive and then share the link with your client.
Here are the steps:
1. Create your creative in GWD.
2. Click the arrow icon next to Publish button, and select Publish to Google Drive.
3. Please sign in with your Gmail account when prompted and accept the GWD permission request.
4. GWD will upload the published file to Google Drive.
5. Go to your Google Drive account, open the uploaded folder and select the index.html file. Open the Details info like the following screenshot, you will see the URL link under Hosting. You can then send this link to your client.

Let me know if you have any questions.
Thanks,
Emily (GWD Team)