1-2 pm. The Grandparents Raising Grandchildren (GRG) Support Group is a collaboration between MSU Extension Office and Missoula Aging Services. It meets on the third Wednesday (March 21, April 18 & May 16) from 1-2 p.m. at Missoula Aging Services, 337 Stephens Ave. There is no cost to participate. Please come join the group for education, and access to research based support and resources that will enable parenting grandparents to led healthier, happier lives.