Ghost Recon Wildlands uses Easy Anti-Cheat (EAC). While save editing is generally safer than active "god mode" cheats, editing your Tier One rank while connected to servers can trigger flags.
The first step is to find a reputable save editor. Websites like Nexus Mods, GitHub, or dedicated gaming forums often host save editors and mods for a wide range of games, including Ghost Recon: Wildlands. ghost recon wildlands save editor pc full