Multiblogs and subdomains

This is what I want to do:

I want to have more than one blog but don’t want to use the multiblog alternatives I have found on the net.
I have one blog on my wp site, which works.
I want to write the other on blogger.com but show it on my wp site.
I have created a page on my wp site called our-garden for the blog.
I have created a subdomain called gdn.mydomain.se.
I have redirected gdn.mydomain.se to ghs.google.com so that people who surf to gdn.mydomain.se end up at my blog on blogger.com (this is confirmed).
I now want to fix it so that people who visit my site, and land on the our-garden page are routed to gdn.mydomain.se and thence to blogger.com. Can anyone help me with this bit, please, or suggest an alternative arrangement of what I have and/or can set up which will achieve the same end.

Additional information:
At the moment gdn.mydomain.se is a separate directory tree at my webhotel, which I created myself, with a public_html directory but nothing else – no files – but the location of gdn.mydomain.se can be moved to, say, a subdirectory of mydomain.se. However, since surfing to gdn.mydomain.se takes one to blogger.com, there is no point at present in having that directory tree.

Much obliged.

James