Updated list...
Oldest Gyms still in business
1988 - Greensboro All Stars, ASG Cougar Cheer
1990 - Charlotte All Stars
1991 - GymTyme All Stars
1992 - Pro Cheer (?)
1994 - Cheer Athletics, Texas Lonestar, World Cup, Premier Athletics
1995 - Memphis Elite, Spirit of Texas
1996 - CJA, Twist and Shout
1997 - Pro Spirit, Top Gun (?)
1998 - ACX
known "old" gyms (16+ years), but don't know date
Cheer Station (Austin, TX)
CEA
Are we confusing the current Pro Cheer with the old red/black/white Pro Cheer from Kansas?