gobject:param-spec-gtype (name nick blurb is-a-type flags)

name -- a string with the canonical name
nick -- a string with the nick name
blurb -- a string with the description
is-a-type -- a g:type-t type ID whose subtypes are allowed as values of the property (use the "void" type for any type)
flags -- a g:param-flags value

The newly created g:param-spec-gtype parameter specification.

Creates a new parameter specification instance specifying a "GType" property. See the g:param-spec-internal function for details on property names.