EPL 1.0 says, in section 7: "The Program (including Contributions)
may always be distributed subject to the version of the Agreement
under which it was received. In addition, after a new version of
the Agreement is published, Contributor may elect to distribute the
Program (including its Contributions) under the new version."
The Eclipse Foundation also encourage everyone to upgrade:
https://www.eclipse.org/legal/epl-2.0/faq.php#h.60mjudroo8e5https://www.eclipse.org/legal/epl-2.0/faq.php#h.tci84nlsqpgw
Unfortunately the new Secondary License option is not available to
us as we're not the original copyright holders and don't have the
legal power to add one. So, no GPL compatibility. Sorry.