It WILL fit. The interiors of G1s were redesigned for the '90 model year. When the G2s came out in '92, the lower dash, cluster mounts, and cluster wiring were left the same. I'm assuming your GL doesn't have a tach, but if you put in the SHO's cluster, the tach WILL work because the tach is computer controlled (as is the fuel and temp guages). The speedo is mechanical and that will work perfectly if you don't take the needle off. The hardest part is getting the dash apart and that's not even hard! It's just very time consuming.