Thompkins signed a contract with the Pittsburgh Steelers last season, but was released one week later.
A limited number of tickets are still available for purchase through Ticketmaster.
Gonzalez signed a rookie contract with the Arizona Cardinals after not being selected in the 2020 NFL Draft, but he was eventually waived coming out of training camp.
The former Penn State football linebacker signed a one-day contract to retire as a member of the Kansas City Chiefs.
The Nittany Lions escaped the three-game series against the Hawkeyes with a 5-2 win in the final matchup of the series.
This weekend will be far from the first time Penn State graduates received their diplomas in Beaver Stadium.