How much time are you looking at for your connection in GRU?

I've done many domestic to international connections in GRU and you will have to clear security again in GRU, so allow time for that, plus going through passport control. There is no elite line (but then you say you don't have status, so not an issue) and the line for security/passport can take anywhere from 10 minutes to 90 minutes. Obviously, if running really tight, see if passengers will let you cut in line but don't count on it.