Day Job 10 hrs (Drug Dealer) - you need the SINner quality for the Day Job quality, which makes 'drug dealer' possibly not one you'd go for. Made Man (with the group contact being your gang) would make more sense.
Int 2, Log 3 - I would swap these around, if not go Int 4, Cha 3 (assuming you actually want this), Log 1, and spend the saved karma elsewhere.
Biotech 2 - At Logic 2, I wouldn't. How much do they know about surgery, or working with cyberware / bioware? First Aid 1 + Chemistry 1 would be plenty for a dealer.
Close Combat 5 - They're quite good at all forms of close combat? Most people would pick one, and let skill substitution work out the rest. Clubs is a good choice, as a troll can make almost anything a club, but unarmed and In Debt to afford used titanium bone lacing + 4* striking callus would be quite nasty.
Firearms 3 - ditto close combat. As a troll ganger, you probably didn't learn the finer points of stance and aiming. Automatics would suit, and the Krime Spree was built just for you. (alternatively, the Krime Boss & Longarms ... but I recommend automatics)
Influence 4 - Intimidation will be the main skills expected of troll gangers. Con [fast talk] will be needed from time to time. Etiquette you should have.
Outdoors 4 - good choice.
Stealth 2 - I'd go higher, but you don't have to. Possibly just drop the group to take Sneaking, unless you want to focus on disguises (unlikely) or palming (even more unlikely).
Good pants $50, Good shoes $50, Backpack $100, etc ...
Take a squatter lifestyle. This will include basic clothes, bags, food, entertainment for the month. You can reduce the cost by putting it in a dangerous location (-20%) and making it cramped (-10%).
Bandoleer for shells $650 - how is this so expensive, and what is it? Even the reactive myomer pack doesn't cost this much.
Renraku Sensei $1000 - unless you have a wireless bonus you desperately want to defend, take something cheaper.
Fake Shotgun License(rating 3) $600 - drop this, and keep your guns hidden.
Medkit Supplies $100 - no medkit? Let someone else do it.
Biomonitor $300 - you don't need this - you don't have medical services to alert, and there's no gear that will use it. Get a good respirator instead.
3 doses Deepweed $1200 - go with some cheaper, fun drugs like eX, Aisa, Hurlg, and Push.