is this a dedicated device, or a smartphone app with accompanying gun mount?
tbh i'm not sure gun-mounted it the best move, maybe an arm or admin pouch mounted system would be better.
it's also worth asking how is this meant to identify enemies? is it a case of everyone with these devices assigns a team and folks on the opposite team show up as red?
because i can't think of a reason why people would willingly expose themselves electronically when a big part of many people's playstyles is stealth. likewise if the objectives element requires sites to purchase equipment that's going to limit the market.
as a system for purely identifying friendlies, then a smartphone app that allows live gps positions of a user group i can see being useful, there are some products aimed at hunters and the like (presumably you can shout "hey there's deer over here" without actually shouting)
although such a system would only really be marketable to groups who play together in an organised fashion, which outside of the milsim market tends not to happen too much and the bulk of the skirmishing market isn't going to be that interested.
as an example, trying to sync radio's with random folks who happen to be in your team that weekend never normally works out, you either end up with a load of useless chatter or nobody bothers communicating at all.