To install to gpt disks you will need to choose a (b)oot disk layout in setup-partitions for the boot drive to be confgured correctly.
Boot an Alpine Linux iso &:
setup-interfaces # <enter> x 3
ifup eth0
setup-apkrepos # choose one near you
apk add wget ca-certificates
wget http://it-offshore.co.uk/alpine/setup-disk #redirects to raw github script
wget http://it-offshore.co.uk/alpine/setup-partitions #redirects to raw github script
chmod +x set*
./setup-partitions
./setup-disk -m sys -E # hard disk encrypted installation
