How do i make it so specific teams have specific gear?

First, we will need to loop through the players.

for i,v in pairs(game.Players:GetChildren() do

end

Then, we detect the team that the player is on.

for i,v in pairs(game.Players:GetChildren() do
    if v.Team == (team) then --Is the player on this team?

    end
end

Finally, insert the tool. You can have a tool in ReplicatedStorage or insert it via the script, as well.

for i,v in pairs(game.Players:GetChildren() do
    if v.Team == (team) then --Is the player on this team?
        local tool = game.ReplicatedStorage.Tool:Clone()
        tool.Parent = player.Backpack
    end
end