As mentioned in the spec: The number is limited by the hypervisor (max number of nics supported).
From: Chandan Purushothama Sent: Tuesday, 9 April 2013 4:02 AM To: Kishan Kavala; dev@cloudstack.apache.org Subject: How many Private Gateways can be created to a VPC? Hello Kishan, I referred to the Information present at https://cwiki.apache.org/confluence/display/CLOUDSTACK/Add+more+than+one+Private+GW+to+a+VPC . It doesn't mention any limitations pertaining to how many private gateways can be created to a VPC. May I know the limitation for this feature, Thank you, Chandan.