I think it's been a few months since anybody asked the (inflammatory)
Electrical Code question, so here goes:

I'm thinking about added some circuits to the garage. (Yeah, I'll have a
competent contractor do it, but I'd like to learn alittle bit about code,
anyhow).

I'm thinking I'd like two 20A 240V's and two 20A 120V circuits added.

The garage is finished - drywall and insulated - so I'd run them outside the
walls.

1. Outside the walls means the wire has to be protected right? As in BX or
conduit, right?
2. Is GFCI a usual requirement for garage outlets? (Cause it's a wet area,
right)?
3. If yes to GFCI, the 240V runs too?
4. If yes to GFCI, then why is the existing outlet in my garage GFCI, but
the two in there feeding the door openers not GFCI? Because they're 10' up?
5. Speaking of up - is there a minimum height off the floor for outlets?
The builder put a nasty dryer vent run through the garage and I'd prefer the
outlets below that. Guessing they'll be 6-8" off the floor.

I don't want the expense of a subpanel *in* the garage. There's already a
100A one in the basement adjacent to the garage, so my thought was to use
that.

Any other NEC things to think about when putting in new runs in a finished
garage?
Thank you!