The following list shows the mapping of VyOS tunnel encapsulation modes to the corresponding Linux mode.
VyOS Linux gre gre gre-bridge gretap ipip ipip ipip6 ipip6 ip6ip6 ip6ip6 ip6gre ip6gre sit sit
Besides gre-bridge this is pretty consistent.
As bridge interfaces are also called tap interfaces gre-bridge will be renamed to gretap to make the post-processing much easier.
In addition also the local-ip CLI node is renamed to source-address to keep a consistent CLI style