Feature request - synchronize selected events by tag

[romanakmath]

Hello,
a friend of mine has a following problem. He would like to synchronize some particular events to google calendar.
To be more specific, within one org file, there are some events that he would like to synchronize with google calendar, and there are some events that he would like to keep locally.

As far as I know, we can only specify a complete org file which will be synchronized with google calendar all the time.
My question is if there is any support for tag-based synchronization, so only events with a specific tag (for example named gcal ) will be uploaded to the google calendar server.