While the is a premium, paid plugin, there is no official "free" version provided by Waves outside of their standard trial periods. If you are looking for that legendary "SSL Glue" sound for free, several high-quality alternatives emulate the same G-Series VCA hardware. Top Free SSL-Style Alternatives
If you are looking for that specific SSL "glue" sound without the cost, these free plugins are widely recommended by experts: Buster SE (by Analog Obsession) Ssl G-master Buss Compressor Free - Download