Nowadays, many countries have adopted electronic Government Interoperability Framework (e-GIF) for their interoperable systems. The e-GIFs normally set out the policies, standards, guidelines and technical structure. Our literature review shows that the failure that governments face regarding e-GIFs includes lack of experience in their implementation. In fact, only following the suggested open standards, policies and contexts guideline in e-GIFs may be insufficient. The successful e-GIF adoption needs more practical implementation support. This paper proposes a practical approach to electronic government interoperability. The approach considers the adoption of Interoperability Practical Implementation Support (IPIS) tool. In this paper, we develop the IPIS tool and evaluate the results. A comparison between approaches with and without the IPIS tool illustrates significant differences. The case in this paper is a Thailand e-GIF pilot project to build a common XML schema standard for data exchange.