So, GSCE, so thats what you get age 16? Well, to study a bachelor's in a polytechnic you need something "on top" of that:
§ Completed Finnish upper secondary education or the Finnish matriculation examination (Act on the Organisation of the Matriculation Examination (672/2005) § International Baccalaureate, Reifeprüfung or European Baccalaureate examination § A vocational college diploma or higher vocational diploma (e.g. in engineering) completed in Finland. § A vocational qualification of at least three years duration, completed in Finnish vocational upper secondary education and training, referred to in the Vocational Education and Training Act (630/98), or an earlier corresponding qualification completed in Finland. § A vocational qualification in adult education of at least three years duration, referred to in the Vocational Adult Education Act (631/98) completed in Finland. § a further vocational qualification (ammattitutkinto) or specialist vocational qualification (erikoisammattitutkinto) completed in Finland by 14th February 2012 or
§ A foreign qualification which gives eligibility for higher education in the awarding country.
There are a few schools offering the IB and of course theres the Finnish baccalaureate. If you are adult living in the GHA, then your best bet is http://www.eira.fi/high-school/lukioandhighschool. Also, theres a load of Vocational Colleges. Magic word is "ammattiopisto". Caveat is, they're mainly catering to the Finnish & Swedish speaking population. There are some "immigrant" special paths, but they do require Finnish at some level to start.
"By the pricking of my thumbs, Something wicked this way comes."