GRZ had two mills under construction each with a capacity of 35k tons per day. They sold one so they still have the other one and the capacity to process 35 k tpd which is actually more ore than the original KRY proposal.

So to answer your question, GRZ would have the equipment to startup a significant operation, but it is unlikely that 35k tpd would be economic at Brisas grades but it may work for the higher grades at Las Cristinas.

The purchaser of the other 35k tpd mill was never disclosed. It is possible however with the recent downturn that used equipment may become available from other miners who are shutting down mines.