I've always liked the idea of some GDR forces remaining loyal to the old regime and fighting on with the Soviets.
James and this wiki site..
http://twilight2000.wikia.com/wiki/R%C3%BCgen_Island touch on this with GDR forces ocupying Rugen Island. GDR forces are made up of ultra-loyal German communists, as well as from many German POW offered a position in newly raised units.
Orbat
Rugen Island, Germany
Soviet Naval Infantry
GDR 40th Fallschirmjaeger Battalion
GDR 1st Guards Motorized Rifle Regiment
GDR 2nd Guards Motorized Rifle Regiment
GDR 29th Naval Infantry Regiment
GDR MfS Wachregiment Feliks E. Dzierzynski
GDR MfS Wachregiment Freidrich Angels
GDR 6th Naval Flotilla
Poland
GDR 2nd Motorised Rifle Division
GDR 73rd Fallschirmjaeger Battalion
GDR MfS Wachregiment Hugo Eberlein