According to various PDF it is listed as assorted weights of Polo. Such as Polo11R-Buch, Polo22K-Leicht etc.

I suppose it must be custom.

(GST) Polo is a typeface by Georg Salden. Not custom at all.

Thank you very much for your reply's.
Are there any fonts that are similar/look like GST Polo?

Taz
FF Zwo

Thanks for the clarification Jan.

I'm afraid I jumped to conclusions after I couldn't find anything about it at the usual places. It is rather difficult to find out about isn't it?

Richard siad It is rather difficult to find out about isn’t it?

Search typohile!
http://typophile.com/node/32095

Sorry, maybe I should have included a little smiley in my post. I was trying to be ironic (I think).

I'd found that post, after Jan's ID, and was trying to alude to that post and his search for more information only last year.

Don’t worry, Richard. It is difficult to find out about GST Polo on the web. It can be purchased only from Georg Salden’s website. Actually, I hadn’t seen it for so long, I didn’t recognize it.