I doubt that the prices will go up by a significant margin. Sure, people will try but G&L instruments generally never had such a great resale value.
How many famous musicians have played a G&L of any kind as their main instrument ? That's where a lot of "legendary" market value comes from, IME.
FWIW, I loved my El Toro and it was my "main" bass throughout the '90s. A mighty fine instrument, like most of their older stuff.