All services. There is an albergue in this town, on the main road. It is not pilgrim specific, but they do have pilgrim prices and large rooms with private baths. Beware large school groups which will keep you up well into the night. Also, you may be interested in getting a stamp at the town Casa de Cultura (free wifi) as the Albergue does not have one.
The walk from Quiroga to Monforte de Lemos is long and short on services along the way. Pack as much as you can, and fill up as often as allows. At certain points along the way the track is vague, poorly marked, coincided with another trail (one of them is marked, ironically, the GR-8), and similarly diverge from other trails without notice. Perhaps there is a man walking his dog who knows the way, perhaps there is not.
Between Quiroga and Monforte de Lemos there are few places to stock up on water, and many places to get lost. Stock up on water as often as you can, and pay close attention to the arrows.
Leaving Quiroga along the main road, cross under the N-120 and follow the country lane (LU-933) which runs along the river.