When you're out exploring or completing missions, keep your eyes peeled for the large military crates. So how do you get a better gear score? Loot, buying weapons and gear from the shop, blueprints for weapons on demand, ultimately the same way you would increase it in any looter shooter. But if you're fearless and have superb aim, you can still get it done at any gear score.
Gear has different rarity, different perks, and while higher level enemies can still be taken out with a single headshot, they may well be better armored or faster, or able to take you out with ease in some other way. The gear score is a representation of the overall quality of the equipment, and your gear score is an average score of all your currently equipped gear. As you progress through the game your character will become more powerful, level up and earn higher level gear. If you've played The Division 2, it's a fairly similar idea. The gear score is one of the newest mechanics in Ghost Recon and has been one of the more debated topics in the run-up to the game's launch.