If your trusting that Glocks partially cocked striker system is safer than other systems, don't. There is enough energy stored in the Glocks safe action system, it will set off most primers in the event the striker slipped off the cruciform and the striker safety block failed. I have tested this multiple times over the years.
Of course all other safeties would have to fail for it to happen, but just know their partially cocked system, isn't a 100% prevention.
With that, as others have said, the GPT completely changes Glocks current fire control system to a fully cocked system, like most other striker fired pistols. IMO the GPT is at least as safe as the traditional Glock firing system, and possibly even safer.
Either way, the one thing I enjoyed about my Sig P320, VP9, and a few others was the much cleaner, less disruptive trigger action and break as compared to my Glocks. The GPT gives me the attributes I like about the other trigger systems, but with all the other aspects of the Glock that I have come to appreciate and trust in the 30 plus years of carrying them on and off duty.
I can work a factory Glock trigger system just fine, but far and away prefer the GPT, especially with the VEX shoe added to the mix.
TXPO