Just to summarize plus add a little bit, it's probable that the virtual summer series registration will be much too late to gift by Christmas. You could gift the Virtual 12Ks of Christmas (but those should be completed by the end of December, so he'd normally need to start the runs before the 25th). Finally, last year there was a "Virtual Love on the Run 14-miler" with a registration in September, so if they do that again that might fit your date criteria.
Here's a link to the runDisney race calendar, which includes the virtual races:
https://www.rundisney.com/race-season-calendar/
Good luck!