src/main/java/org/gm4java/engine/support/SimpleGMService.java
public void setGMPath(@Nonnull String gmPath) {
        if (gmPath == null) throw new NullPointerException("gmPath");
        factory = builder.buildFactory(gmPath);
    }
public void setGMPath(@Nonnull String gmPath) {
        if (gmPath == null) throw new NullPointerException("gmPath");
        factory = builder.buildFactory(gmPath);
    }
Sets the path to GraphicsMagick executable.

@param gmPath
the path to GraphicsMagick executable