Depends....I again recommend you read the MEC Schedule Alert 19-07 that I linked to my earlier reply. It's spelled out right there. From the schedule alert:

"A pilot may also be awarded a GS rotation with a report that is earlier than ten hours after the end of the pilot’s last non-fly day (normally 1000 pilot base time). In such a case, the pilot would receive single pay, no credit (above the guarantee) for the first duty period, regardless of when the pilot is actually notified of the award.

Example:
At 0930 on his last X-day, a pilot is notified of a GS award for a rotation reporting at 0500 on his first on call day. Although the notification in this case occurs more than 12 hours prior to report, he will receive single pay, no credit (above the guarantee) for the first duty period of the rotation if he accepts the proffer"

This scenario is unique to coming off a non-fly day (i.e. GS on first day of RES block). If you are already on day 2 or 3 of your 5 day block of RES days and you take the GS, then it goes toward the guarantee, not above it.