Gold Star Wives are eligible for free or discounted sports or concert tickets through Vet Tix (https://www.vettix.org). From their web site:

Veteran Tickets Foundation teams up with major sports teams, leagues, promoters, organizations, venues and ticket holders to provide free and discounted tickets to the more than 21 million military and veterans. Currently serving military, honorably discharged veterans from all branches of service, and family of those Killed In Action are eligible. VetTixer's accounts are active once we verify service status. Tickets are either distributed directly to military bases or claimed through our website.