How do I "release" grades for an item to students all at one time in Gauchospace?

To release grades to students all at once, you should hide the grade item from students until all items are graded, then make the grade item visible again.

Note: If you are trying to hold/release grades for a quiz you will need to use the "Review options" setting to withold and release "Points" for the quiz, more information can be found here. 

1. In the Administration Block click Gradebook setup.
2. To hide a grade item, under the Actions column to the right of the name of the grade item, click Edit, then click Hide.

When you are ready to make them visible again, do the following:

1. In the Administration Block click Gradebook setup.
2. To make the grade item visible, under the Actions column to the right of the name of the grade item, click Edit, then click Show.

You can also use grading workflow to set and release grades.