GraphicsMagick requires libgomp, which is not provided

I am attempting to install the GraphicsMagick package on SLES 12, using the instructions found at

Following those instructions, I get this error:

zypper addrepo

Adding repository ‘Graphics Project (SLE_12)’ […done]
Repository ‘Graphics Project (SLE_12)’ successfully added
Enabled: Yes
Autorefresh: No
GPG check: Yes

zypper refresh graphics

Retrieving repository ‘Graphics Project (SLE_12)’ metadata […

Automatically importing the following key:

Repository: Graphics Project (SLE_12)
Key Name: graphics OBS Project
Key Fingerprint: 4B9E37E2 BED9C972 5FAD399D 55E7BAF9 4F311B1D
Key Created: Mon Aug 10 05:45:38 2015
Key Expires: Wed Oct 18 05:45:38 2017
Rpm Name: gpg-pubkey-4f311b1d-55c89cf2

Building repository ‘Graphics Project (SLE_12)’ cache […done]
Specified repositories have been refreshed.

zypper install GraphicsMagick

Loading repository data…
Reading installed packages…
Resolving package dependencies…

Problem: nothing provides needed by libGraphicsMagick-Q16-3-1.3.25-89.5.x86_64
Solution 1: do not install GraphicsMagick-1.3.25-89.5.x86_64
Solution 2: break libGraphicsMagick-Q16-3-1.3.25-89.5.x86_64 by ignoring some of its dependencies

Choose from above solutions by number or cancel [1/2/c] (c):

That package is part of a gcc update, if the system is registered for updates, then should be available via subscribed update repo or patch finder…