As PostGIS 1.5.0 includes shp2pqsql-gui, a very similar tool, gshp2pgsql is not maintained any more.
Gshp2pgsql provides a graphical interface (GUI) to load shapefiles to PostGIS databases. It is free software released under the terms of the GPL.
The source code is available through the Subversion repository:
This page is also available in: Deutsch.