Not legally from any reputable source.

While the official Waves SSL G-Master Buss Compressor is a paid product, you can access its legendary "glue" sound through official trials or high-quality free alternatives that emulate the same iconic SSL 4000 G hardware. Official SSL G-Master Options

: A classic freeware VCA compressor based on the SSL design. It is known for its "Shaping" control, which allows you to adjust the speed of the compressor's attack for more or less punch .