Just shows how wrong I am:

./bin/gapminer --help
GapMiner  Copyright (C)  2014  The Gapcoin developers  <info@gapcoin.org>

Required Options:   
  -o  --host              host ip address
  -p  --port              port to connect to
  -u  --user              user for gapcoin rpc authentification
  -x  --pwd               password for gapcoin rpc authentification

Additional Options:

  -q  --quiet             be quiet (only prints shares)
  -e  --extra-verbose     additional verbose output
  -j  --stats-interval    interval (sec) to print mining informations
  -t  --threads           number of mining threads
  -l  --pull-interval     seconds to wait between getwork request
  -m  --timeout           seconds to wait for server to respond
  -c  --stratum           use stratum protocol for connection
  -s  --sieve-size        the prime sieve size
  -i  --sieve-primes      number of primes for sieving
  -f  --shift             the adder shift
  -r  --crt               use the given Chinese Remainder Theorem file
  -d  --fermat-threads    number of fermat threads wen using the crt
  -b  --benchmark         run a gpu benchmark
  -g  --use-gpu           use the gpu for Fermat testing
  -d  --gpu-dev           the gpu device id
  -w  --work-items        gpu work items (default 2048)
  -z  --queue-size        the gpu waiting queue size (memory intensive)
  -a  --platform          opencl platform (amd or nvidia)
  -n  --num-gpu-tests     the number of test per gap per gpu run
  -h  --help              print this information
  -v  --license           show license of this program


My XPS laptop has a built-in NVidia GPU and barrystyle kindly DM'd me a diff for compilation with NVidia. The diff and my reports on progress are in the "mining" channel on the Gapcoin Discord.

Cheers

Graham