Final answer:
The NIC Gold Medal is an award given by the North-American Interfraternity Conference, and information regarding Sigma Pi alumni recipients must be sourced from official Sigma Pi or NIC announcements.
Step-by-step explanation:
The question regarding which Sigma Pi alumnus was awarded the NIC Gold Medal pertains to a specific recognition within the Greek letter organizations' community. The NIC Gold Medal is a high honor given by the North-American Interfraternity Conference to individuals who have greatly contributed to the fraternal movement. Although the information about which Sigma Pi alumnus received this distinction might be dated and subject to change, one would typically need to consult Sigma Pi's official communications or the NIC's announcements for accurate and updated information on medal recipients.