You can use scheduled upload publishing to schedule a file in the GPM Downloads section to go public at a specific time. Only you and GPM staff can see the file before it's publicly published.

Scheduling a file to publish later

Files can be scheduled to publish in the future by selecting the appropriate option in the submission area:

Editing a file's scheduled publish time

So long as the file has not already been released, its publication time can be modified (or the file can be released immediately). To do so, use the "Edit Details" button at the bottom of the file:

A note on time zones

The date and time selected are based on your current timezone. The upload will be published publicly for everyone at the same time globally.

File publication can be scheduled for a future release time between 10 minutes and 1 year from the time of upload.