Description of problem: Although Eclipse plugin allows user to create a parallel gateway it is impossible to create it in minimal perspective of Guvnor web-designer. Version-Release number of selected component (if applicable): BRMS-5.3.0-ER4
added to 2.1.x branch on github.
Please verify this issue on ER5. Thanks!
The designer included in BRMS-5.3.0-ER5 fixes this issue.