Great! No, you should not lose your gains from your cycle of Red Growth as long as you follow these three steps:
1. Run a full cycle of Red-PCT beginning the day after you finish taking Red Growth
2. Continue lifting heavy
3. Continue following a diet that promotes mass gain or at least has enough macros/calories that it will maintain your current mass.
Red-PCT was actually specifically designed to be used as a post cycle treatment to help you keep your gains following an anabolic mass gaining cycle. (It's in the name). After developing it for that purpose we realized that it was also fantastic to use as a standalone testosterone booster as well.